cisco-sa-nxos-login-blockfor-rwjgvecu
Vulnerability from csaf_cisco
Published
2021-08-25 16:00
Modified
2021-08-25 16:00
Summary
Cisco NX-OS Software system login block-for Denial of Service Vulnerability
Notes
Summary
A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condition.
This vulnerability is due to a logic error in the implementation of the system login block-for command when an attack is detected and acted upon. An attacker could exploit this vulnerability by performing a brute-force login attack on an affected device. A successful exploit could allow the attacker to cause a login process to reload, which could result in a delay during authentication to the affected device.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu"]
This advisory is part of the August 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: August 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74640"].
Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable release of Cisco NX-OS Software and had the system login block-for CLI command configured:
MDS 9000 Series Multilayer Switches (CSCuz49095 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095"])
Nexus 3000 Series Switches (CSCuz49095 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095"])
Nexus 5500 Platform Switches (CSCvw45963 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963"])
Nexus 5600 Platform Switches (CSCvw45963 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963"])
Nexus 6000 Series Switches (CSCvw45963 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963"])
Nexus 7000 Series Switches (CSCuz49095 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095"])
Nexus 9000 Series Switches in standalone NX-OS mode (CSCuz49095 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095"])
UCS 6200 Series Fabric Interconnects (CSCvx74585 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585"])
UCS 6300 Series Fabric Interconnects (CSCvx74585 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585"])
The system login block-for command is disabled by default.
Note: The login block-for mode command was renamed system login block-for on certain Cisco NX-OS platforms and newer code trains. At the time of publication, this vulnerability applied to both forms of the command.
For information about which Cisco software releases are vulnerable, see the Fixed Software ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ipv6-netstack-edXPGV7K#fs"] section of this advisory. See the bug ID(s) at the top of this advisory for the most complete and current information.
Determine the Device Configuration
NX-OS Software
To determine whether an affected device is configured with the login block-for or system login block-for CLI command, use the show running-config | include block-for command from the Cisco NX-OS CLI. If this command returns output, the device is considered vulnerable. The following example shows the output of the show running-config | include block-for command if the system login block-for command is configured on a device that is running Cisco NX-OS Software:
nexus# show running-config | include block-for
system login block-for 30 attempts 20 within 120
UCS Software
To determine whether a UCS 6200 Series or 6300 Series Fabric Interconnect is configured to block login requests, use the Cisco UCS Manager web UI to perform the following steps:
Go to the Navigation pane and click Admin.
Choose Expand All > User Management > User Services > Login Profile.
Go to the Work pane and see the setting of the Enable radio button in the Admin State field. If the Enable radio button is selected, the device is considered vulnerable.
The Login Profile configuration is disabled by default.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following Cisco products:
Firepower 1000 Series
Firepower 2100 Series
Firepower 4100 Series
Firepower 9300 Security Appliances
Nexus 1000 Virtual Edge for VMware vSphere
Nexus 1000V Switch for Microsoft Hyper-V
Nexus 1000V Switch for VMware vSphere
Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode
UCS 6400 Series Fabric Interconnects
Details
The system login block-for feature can detect and protect against brute-force login attacks to the device. For information about the system login block-for command, see Configuring Login Parameters ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B"] in the Configuring AAA chapter of Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html"].
Indicators of Compromise
Exploitation of this vulnerability could cause the authentication, authorization, and accounting (AAA) daemon process to crash and generate an error message that is similar to the following:
%SYSMGR-2-SERVICE_CRASHED: Service "AAA Daemon" (PID 22769) hasn't caught signal 11 (core will be saved).
This error message could have multiple causes. Customers who observe this message on a device are advised to contact their support organization to determine whether the message indicates that the device has been compromised by exploitation of this vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
The device is only vulnerable if the system login block-for command is configured and a potential DoS attack was detected. If the command is removed using no [system] login block-for seconds attempts tries within seconds, the device is no longer vulnerable.
However, removing the system login block-for configuration weakens the security posture of the device. For additional information, see Configuring Login Parameters ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B"] in the Configuring AAA chapter of Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html"].
While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
Fixed Software
When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page ["https://www.cisco.com/go/psirt"], to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Cisco NX-OS Software
To help customers determine their exposure to vulnerabilities in Cisco NX-OS Software, Cisco provides the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to identify any Cisco Security Advisories that impact a specific Cisco NX-OS Software release and the earliest release that fixes the vulnerabilities that are described in each advisory (“First Fixed”). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (“Combined First Fixed”).
Customers can use the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to search advisories in the following ways:
Choose the software, platform, and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include all Cisco Security Advisories or one or more specific advisories.
Customers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by choosing the Cisco NX-OS Software and platform and then entering a release—for example, 7.0(3)I7(5) for Cisco Nexus 3000 Series Switches or 14.0(1h) for Cisco NX-OS Software in ACI mode:
Cisco NX-OS Software Cisco NX-OS Software in ACI Mode MDS 9000 Series Multilayer Switches Nexus 1000V Series Switches Nexus 3000 Series Switches Nexus 5000 Series Switches Nexus 6000 Series Switches Nexus 7000 Series Switches Nexus 9000 Series Switches
By default, the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker and check the Medium check box in the drop-down list under Impact Rating when customizing a search.
Cisco UCS Software
At the time of publication, the release information in the following table(s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability.
UCS 6200 and 6300 Series Fabric Interconnects: CSCvx74585 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585"]
Cisco UCS Software Release First Fixed Release for This Vulnerability Earlier than 4.0 Migrate to a fixed release. 4.0 4.0(4m) 4.1 4.1(3d) 4.2 Not vulnerable.
Additional Resources
For help determining the best Cisco NX-OS Software release for a Cisco Nexus Switch, see the following Recommended Releases documents. If a security advisory recommends a later release, Cisco recommends following the advisory guidance.
Cisco MDS Series Switches ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/b_MDS_NX-OS_Recommended_Releases.html"]
Cisco Nexus 1000V for VMware Switch ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/recommended_releases/b_Cisco_N1KV_VMware_MinRecommendedReleases.html"]
Cisco Nexus 3000 Series Switches ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_3000_Series_Switches.html"]
Cisco Nexus 5500 Platform Switches ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/release/recommended_releases/n5500_recommended_nx-os_releases.html"]
Cisco Nexus 5600 Platform Switches ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/release/recommended_releases/n5600_recommended_nx-os_releases.html"]
Cisco Nexus 6000 Series Switches ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/release/recommended_releases/recommended_nx-os_releases.html"]
Cisco Nexus 7000 Series Switches ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/recommended_releases/recommended_nx-os_releases.html"]
Cisco Nexus 9000 Series Switches ["http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_9000_Series_Switches.html"]
Cisco Nexus 9000 Series ACI-Mode Switches ["https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/recommended-release/b_Recommended_Cisco_ACI_Releases.html"]
To determine the best release for Cisco UCS Software, see the Recommended Releases documents in the release notes for the device.
Vulnerability Policy
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Source
This vulnerability was found during the resolution of a Cisco TAC support case.
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.
{ "document": { "acknowledgments": [ { "summary": "This vulnerability was found during the resolution of a Cisco TAC support case." } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "notes": [ { "category": "summary", "text": "A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to a logic error in the implementation of the system login block-for command when an attack is detected and acted upon. An attacker could exploit this vulnerability by performing a brute-force login attack on an affected device. A successful exploit could allow the attacker to cause a login process to reload, which could result in a delay during authentication to the affected device.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu\"]\r\n\r\nThis advisory is part of the August 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: August 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74640\"].", "title": "Summary" }, { "category": "general", "text": "At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable release of Cisco NX-OS Software and had the system login block-for CLI command configured:\r\n\r\nMDS 9000 Series Multilayer Switches (CSCuz49095 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095\"])\r\nNexus 3000 Series Switches (CSCuz49095 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095\"])\r\nNexus 5500 Platform Switches (CSCvw45963 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963\"])\r\nNexus 5600 Platform Switches (CSCvw45963 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963\"])\r\nNexus 6000 Series Switches (CSCvw45963 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963\"])\r\nNexus 7000 Series Switches (CSCuz49095 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095\"])\r\nNexus 9000 Series Switches in standalone NX-OS mode (CSCuz49095 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095\"])\r\nUCS 6200 Series Fabric Interconnects (CSCvx74585 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585\"])\r\nUCS 6300 Series Fabric Interconnects (CSCvx74585 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585\"])\r\n\r\nThe system login block-for command is disabled by default.\r\n\r\nNote: The login block-for mode command was renamed system login block-for on certain Cisco NX-OS platforms and newer code trains. At the time of publication, this vulnerability applied to both forms of the command.\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ipv6-netstack-edXPGV7K#fs\"] section of this advisory. See the bug ID(s) at the top of this advisory for the most complete and current information.\r\n Determine the Device Configuration\r\nNX-OS Software\r\n\r\nTo determine whether an affected device is configured with the login block-for or system login block-for CLI command, use the show running-config | include block-for command from the Cisco NX-OS CLI. If this command returns output, the device is considered vulnerable. The following example shows the output of the show running-config | include block-for command if the system login block-for command is configured on a device that is running Cisco NX-OS Software:\r\n\r\n\r\nnexus# show running-config | include block-for\r\nsystem login block-for 30 attempts 20 within 120\r\n\r\nUCS Software\r\n\r\nTo determine whether a UCS 6200 Series or 6300 Series Fabric Interconnect is configured to block login requests, use the Cisco UCS Manager web UI to perform the following steps:\r\n\r\nGo to the Navigation pane and click Admin.\r\nChoose Expand All \u003e User Management \u003e User Services \u003e Login Profile.\r\nGo to the Work pane and see the setting of the Enable radio button in the Admin State field. If the Enable radio button is selected, the device is considered vulnerable.\r\n\r\nThe Login Profile configuration is disabled by default.", "title": "Vulnerable Products" }, { "category": "general", "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect the following Cisco products:\r\n\r\nFirepower 1000 Series\r\nFirepower 2100 Series\r\nFirepower 4100 Series\r\nFirepower 9300 Security Appliances\r\nNexus 1000 Virtual Edge for VMware vSphere\r\nNexus 1000V Switch for Microsoft Hyper-V\r\nNexus 1000V Switch for VMware vSphere\r\nNexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode\r\nUCS 6400 Series Fabric Interconnects", "title": "Products Confirmed Not Vulnerable" }, { "category": "general", "text": "The system login block-for feature can detect and protect against brute-force login attacks to the device. For information about the system login block-for command, see Configuring Login Parameters [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B\"] in the Configuring AAA chapter of Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html\"].", "title": "Details" }, { "category": "general", "text": "Exploitation of this vulnerability could cause the authentication, authorization, and accounting (AAA) daemon process to crash and generate an error message that is similar to the following:\r\n\r\n\r\n%SYSMGR-2-SERVICE_CRASHED: Service \"AAA Daemon\" (PID 22769) hasn\u0027t caught signal 11 (core will be saved).\r\n\r\nThis error message could have multiple causes. Customers who observe this message on a device are advised to contact their support organization to determine whether the message indicates that the device has been compromised by exploitation of this vulnerability.", "title": "Indicators of Compromise" }, { "category": "general", "text": "There are no workarounds that address this vulnerability.\r\n\r\nThe device is only vulnerable if the system login block-for command is configured and a potential DoS attack was detected. If the command is removed using no [system] login block-for seconds attempts tries within seconds, the device is no longer vulnerable.\r\n\r\nHowever, removing the system login block-for configuration weakens the security posture of the device. For additional information, see Configuring Login Parameters [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B\"] in the Configuring AAA chapter of Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html\"].\r\n\r\nWhile this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.", "title": "Workarounds" }, { "category": "general", "text": "When considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n Cisco NX-OS Software\r\nTo help customers determine their exposure to vulnerabilities in Cisco NX-OS Software, Cisco provides the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] to identify any Cisco Security Advisories that impact a specific Cisco NX-OS Software release and the earliest release that fixes the vulnerabilities that are described in each advisory (\u201cFirst Fixed\u201d). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (\u201cCombined First Fixed\u201d).\r\n\r\nCustomers can use the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] to search advisories in the following ways:\r\n\r\nChoose the software, platform, and one or more releases\r\nUpload a .txt file that includes a list of specific releases\r\nEnter the output of the show version command\r\n\r\nAfter initiating a search, customers can customize the search to include all Cisco Security Advisories or one or more specific advisories.\r\n\r\nCustomers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by choosing the Cisco NX-OS Software and platform and then entering a release\u2014for example, 7.0(3)I7(5) for Cisco Nexus 3000 Series Switches or 14.0(1h) for Cisco NX-OS Software in ACI mode:\r\n Cisco NX-OS Software Cisco NX-OS Software in ACI Mode MDS 9000 Series Multilayer Switches Nexus 1000V Series Switches Nexus 3000 Series Switches Nexus 5000 Series Switches Nexus 6000 Series Switches Nexus 7000 Series Switches Nexus 9000 Series Switches\r\n\r\n\r\n\r\n\r\nBy default, the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker and check the Medium check box in the drop-down list under Impact Rating when customizing a search.\r\n Cisco UCS Software\r\nAt the time of publication, the release information in the following table(s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability.\r\n\r\nUCS 6200 and 6300 Series Fabric Interconnects: CSCvx74585 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585\"]\r\n Cisco UCS Software Release First Fixed Release for This Vulnerability Earlier than 4.0 Migrate to a fixed release. 4.0 4.0(4m) 4.1 4.1(3d) 4.2 Not vulnerable.\r\n Additional Resources\r\nFor help determining the best Cisco NX-OS Software release for a Cisco Nexus Switch, see the following Recommended Releases documents. If a security advisory recommends a later release, Cisco recommends following the advisory guidance.\r\n\r\n\r\nCisco MDS Series Switches [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/b_MDS_NX-OS_Recommended_Releases.html\"]\r\nCisco Nexus 1000V for VMware Switch [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/recommended_releases/b_Cisco_N1KV_VMware_MinRecommendedReleases.html\"]\r\nCisco Nexus 3000 Series Switches [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_3000_Series_Switches.html\"]\r\nCisco Nexus 5500 Platform Switches [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/release/recommended_releases/n5500_recommended_nx-os_releases.html\"]\r\nCisco Nexus 5600 Platform Switches [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/release/recommended_releases/n5600_recommended_nx-os_releases.html\"]\r\nCisco Nexus 6000 Series Switches [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/release/recommended_releases/recommended_nx-os_releases.html\"]\r\nCisco Nexus 7000 Series Switches [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/recommended_releases/recommended_nx-os_releases.html\"]\r\nCisco Nexus 9000 Series Switches [\"http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_9000_Series_Switches.html\"]\r\nCisco Nexus 9000 Series ACI-Mode Switches [\"https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/recommended-release/b_Recommended_Cisco_ACI_Releases.html\"]\r\n\r\nTo determine the best release for Cisco UCS Software, see the Recommended Releases documents in the release notes for the device.", "title": "Fixed Software" }, { "category": "general", "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.", "title": "Vulnerability Policy" }, { "category": "general", "text": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.", "title": "Exploitation and Public Announcements" }, { "category": "general", "text": "This vulnerability was found during the resolution of a Cisco TAC support case.", "title": "Source" }, { "category": "legal_disclaimer", "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.", "title": "Legal Disclaimer" } ], "publisher": { "category": "vendor", "contact_details": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.", "issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html", "name": "Cisco", "namespace": "https://wwww.cisco.com" }, "references": [ { "category": "self", "summary": "Cisco NX-OS Software system login block-for Denial of Service Vulnerability", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu" }, { "category": "external", "summary": "Cisco Event Response: August 2021 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication", "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74640" }, { "category": "external", "summary": "Cisco Security Vulnerability Policy", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html" }, { "category": "external", "summary": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu" }, { "category": "external", "summary": "Cisco\u0026nbsp;Event Response: August 2021 Cisco\u0026nbsp;FXOS and NX-OS Software Security Advisory Bundled Publication", "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74640" }, { "category": "external", "summary": "CSCuz49095", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095" }, { "category": "external", "summary": "CSCuz49095", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095" }, { "category": "external", "summary": "CSCvw45963", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963" }, { "category": "external", "summary": "CSCvw45963", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963" }, { "category": "external", "summary": "CSCvw45963", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw45963" }, { "category": "external", "summary": "CSCuz49095", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095" }, { "category": "external", "summary": "CSCuz49095", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz49095" }, { "category": "external", "summary": "CSCvx74585", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585" }, { "category": "external", "summary": "CSCvx74585", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585" }, { "category": "external", "summary": "Fixed Software", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ipv6-netstack-edXPGV7K#fs" }, { "category": "external", "summary": "Configuring Login Parameters", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B" }, { "category": "external", "summary": "Configuring AAA chapter of Cisco\u0026nbsp;Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x)", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html" }, { "category": "external", "summary": "Configuring Login Parameters", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html#task_794D196F3DD7430E93F14D9EEC7DE44B" }, { "category": "external", "summary": "Configuring AAA chapter of Cisco\u0026nbsp;Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x)", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/security/configuration/guide/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x/b-cisco-nexus-9000-nx-os-security-configuration-guide-93x_chapter_011.html" }, { "category": "external", "summary": "considering software upgrades", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes" }, { "category": "external", "summary": "Cisco\u0026nbsp;Security Advisories page", "url": "https://www.cisco.com/go/psirt" }, { "category": "external", "summary": "Cisco\u0026nbsp;Software Checker", "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x" }, { "category": "external", "summary": "Cisco\u0026nbsp;Software Checker", "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x" }, { "category": "external", "summary": "Cisco\u0026nbsp;Software Checker", "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x" }, { "category": "external", "summary": "CSCvx74585", "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74585" }, { "category": "external", "summary": "Cisco\u0026nbsp;MDS Series Switches", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/b_MDS_NX-OS_Recommended_Releases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 1000V for VMware Switch", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/recommended_releases/b_Cisco_N1KV_VMware_MinRecommendedReleases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 3000 Series Switches", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_3000_Series_Switches.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 5500 Platform Switches", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/release/recommended_releases/n5500_recommended_nx-os_releases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 5600 Platform Switches", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/release/recommended_releases/n5600_recommended_nx-os_releases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 6000 Series Switches", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/release/recommended_releases/recommended_nx-os_releases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 7000 Series Switches", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/recommended_releases/recommended_nx-os_releases.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 9000 Series Switches", "url": "http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/recommended_release/b_Minimum_and_Recommended_Cisco_NX-OS_Releases_for_Cisco_Nexus_9000_Series_Switches.html" }, { "category": "external", "summary": "Cisco\u0026nbsp;Nexus 9000 Series ACI-Mode Switches", "url": "https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/recommended-release/b_Recommended_Cisco_ACI_Releases.html" }, { "category": "external", "summary": "Security Vulnerability Policy", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html" } ], "title": "Cisco NX-OS Software system login block-for Denial of Service Vulnerability", "tracking": { "current_release_date": "2021-08-25T16:00:00+00:00", "generator": { "date": "2022-10-22T03:10:15+00:00", "engine": { "name": "TVCE" } }, "id": "cisco-sa-nxos-login-blockfor-RwjGVEcu", "initial_release_date": "2021-08-25T16:00:00+00:00", "revision_history": [ { "date": "2021-08-25T15:49:10+00:00", "number": "1.0.0", "summary": "Initial public release." } ], "status": "final", "version": "1.0.0" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "branches": [ { "category": "service_pack", "name": "6.2(18)", "product": { "name": "6.2(18)", "product_id": "CSAFPID-230441" } }, { "category": "service_pack", "name": "6.2(16)", "product": { "name": "6.2(16)", "product_id": "CSAFPID-230442" } }, { "category": "service_pack", "name": "6.2(14b)", "product": { "name": "6.2(14b)", "product_id": "CSAFPID-230443" } }, { "category": "service_pack", "name": "6.2(14)", "product": { "name": "6.2(14)", "product_id": "CSAFPID-230527" } }, { "category": "service_pack", "name": "6.2(14a)", "product": { "name": "6.2(14a)", "product_id": "CSAFPID-230528" } }, { "category": "service_pack", "name": "6.2(20)", "product": { "name": "6.2(20)", "product_id": "CSAFPID-239445" } }, { "category": "service_pack", "name": "6.2(15)", "product": { "name": "6.2(15)", "product_id": "CSAFPID-239500" } }, { "category": "service_pack", "name": "6.2(17)", "product": { "name": "6.2(17)", "product_id": "CSAFPID-239501" } }, { "category": "service_pack", "name": "6.2(19)", "product": { "name": "6.2(19)", "product_id": "CSAFPID-239502" } }, { "category": "service_pack", "name": "6.2(21)", "product": { "name": "6.2(21)", "product_id": "CSAFPID-239503" } }, { "category": "service_pack", "name": "6.2(23)", "product": { "name": "6.2(23)", "product_id": "CSAFPID-239504" } }, { "category": "service_pack", "name": "6.2(20a)", "product": { "name": "6.2(20a)", "product_id": "CSAFPID-248858" } }, { "category": "service_pack", "name": "6.2(17a)", "product": { "name": "6.2(17a)", "product_id": "CSAFPID-265097" } }, { "category": "service_pack", "name": "6.2(22)", "product": { "name": "6.2(22)", "product_id": "CSAFPID-265098" } }, { "category": "service_pack", "name": "6.2(24)", "product": { "name": "6.2(24)", "product_id": "CSAFPID-276904" } }, { "category": "service_pack", "name": "6.2(24a)", "product": { "name": "6.2(24a)", "product_id": "CSAFPID-277926" } }, { "category": "service_pack", "name": "6.2(26)", "product": { "name": "6.2(26)", "product_id": "CSAFPID-281979" } } ], "category": "product_version", "name": "6.2" }, { "branches": [ { "category": "service_pack", "name": "7.0(3)I2(2a)", "product": { "name": "7.0(3)I2(2a)", "product_id": "CSAFPID-220741" } }, { "category": "service_pack", "name": "7.0(3)I2(2b)", "product": { "name": "7.0(3)I2(2b)", "product_id": "CSAFPID-220742" } }, { "category": "service_pack", "name": "7.0(3)I2(2c)", "product": { "name": "7.0(3)I2(2c)", "product_id": "CSAFPID-220743" } }, { "category": "service_pack", "name": "7.0(3)I2(2d)", "product": { "name": "7.0(3)I2(2d)", "product_id": "CSAFPID-220744" } }, { "category": "service_pack", "name": "7.0(3)I2(2e)", "product": { "name": "7.0(3)I2(2e)", "product_id": "CSAFPID-220745" } }, { "category": "service_pack", "name": "7.0(3)I2(3)", "product": { "name": "7.0(3)I2(3)", "product_id": "CSAFPID-220746" } }, { "category": "service_pack", "name": "7.0(3)I2(4)", "product": { "name": "7.0(3)I2(4)", "product_id": "CSAFPID-220747" } }, { "category": "service_pack", "name": "7.0(3)I2(5)", "product": { "name": "7.0(3)I2(5)", "product_id": "CSAFPID-230554" } }, { "category": "service_pack", "name": "7.0(3)I2(1)", "product": { "name": "7.0(3)I2(1)", "product_id": "CSAFPID-230567" } }, { "category": "service_pack", "name": "7.0(3)I2(1a)", "product": { "name": "7.0(3)I2(1a)", "product_id": "CSAFPID-230568" } }, { "category": "service_pack", "name": "7.0(3)I2(2)", "product": { "name": "7.0(3)I2(2)", "product_id": "CSAFPID-230569" } }, { "category": "service_pack", "name": "7.0(3)I2(2r)", "product": { "name": "7.0(3)I2(2r)", "product_id": "CSAFPID-265101" } }, { "category": "service_pack", "name": "7.0(3)I2(2s)", "product": { "name": "7.0(3)I2(2s)", "product_id": "CSAFPID-265102" } }, { "category": "service_pack", "name": "7.0(3)I2(2v)", "product": { "name": "7.0(3)I2(2v)", "product_id": "CSAFPID-265103" } }, { "category": "service_pack", "name": "7.0(3)I2(2w)", "product": { "name": "7.0(3)I2(2w)", "product_id": "CSAFPID-265104" } }, { "category": "service_pack", "name": "7.0(3)I2(2x)", "product": { "name": "7.0(3)I2(2x)", "product_id": "CSAFPID-265105" } }, { "category": "service_pack", "name": "7.0(3)I2(2y)", "product": { "name": "7.0(3)I2(2y)", "product_id": "CSAFPID-265106" } } ], "category": "product_version", "name": "7.0(3)I2" }, { "branches": [ { "category": "service_pack", "name": "7.0(3)I3(1)", "product": { "name": "7.0(3)I3(1)", "product_id": "CSAFPID-220748" } } ], "category": "product_version", "name": "7.0(3)I3" }, { "branches": [ { "category": "service_pack", "name": "7.2(0)D1(1)", "product": { "name": "7.2(0)D1(1)", "product_id": "CSAFPID-230440" } } ], "category": "product_version", "name": "7.2(0)D1" }, { "branches": [ { "category": "service_pack", "name": "7.2(1)D1(1)", "product": { "name": "7.2(1)D1(1)", "product_id": "CSAFPID-225659" } } ], "category": "product_version", "name": "7.2(1)D1" }, { "branches": [ { "category": "service_pack", "name": "7.2(2)D1(2)", "product": { "name": "7.2(2)D1(2)", "product_id": "CSAFPID-230438" } }, { "category": "service_pack", "name": "7.2(2)D1(1)", "product": { "name": "7.2(2)D1(1)", "product_id": "CSAFPID-230439" } }, { "category": "service_pack", "name": "7.2(2)D1(3)", "product": { "name": "7.2(2)D1(3)", "product_id": "CSAFPID-265129" } }, { "category": "service_pack", "name": "7.2(2)D1(4)", "product": { "name": "7.2(2)D1(4)", "product_id": "CSAFPID-265130" } } ], "category": "product_version", "name": "7.2(2)D1" }, { "branches": [ { "category": "service_pack", "name": "7.3(0)D1(1)", "product": { "name": "7.3(0)D1(1)", "product_id": "CSAFPID-230437" } } ], "category": "product_version", "name": "7.3(0)D1" }, { "branches": [ { "category": "service_pack", "name": "7.3(0)DX(1)", "product": { "name": "7.3(0)DX(1)", "product_id": "CSAFPID-230436" } } ], "category": "product_version", "name": "7.3(0)DX" }, { "branches": [ { "category": "service_pack", "name": "7.3(0)DY(1)", "product": { "name": "7.3(0)DY(1)", "product_id": "CSAFPID-230448" } } ], "category": "product_version", "name": "7.3(0)DY" }, { "branches": [ { "category": "service_pack", "name": "7.3(0)N1(1)", "product": { "name": "7.3(0)N1(1)", "product_id": "CSAFPID-220737" } }, { "category": "service_pack", "name": "7.3(0)N1(1b)", "product": { "name": "7.3(0)N1(1b)", "product_id": "CSAFPID-230468" } }, { "category": "service_pack", "name": "7.3(0)N1(1a)", "product": { "name": "7.3(0)N1(1a)", "product_id": "CSAFPID-230469" } } ], "category": "product_version", "name": "7.3(0)N1" }, { "branches": [ { "category": "service_pack", "name": "7.3(1)D1(1)", "product": { "name": "7.3(1)D1(1)", "product_id": "CSAFPID-230435" } } ], "category": "product_version", "name": "7.3(1)D1" }, { "branches": [ { "category": "service_pack", "name": "7.3(1)DY(1)", "product": { "name": "7.3(1)DY(1)", "product_id": "CSAFPID-230446" } } ], "category": "product_version", "name": "7.3(1)DY" }, { "branches": [ { "category": "service_pack", "name": "7.3(1)N1(1)", "product": { "name": "7.3(1)N1(1)", "product_id": "CSAFPID-227352" } } ], "category": "product_version", "name": "7.3(1)N1" }, { "branches": [ { "category": "service_pack", "name": "7.3(2)D1(1)", "product": { "name": "7.3(2)D1(1)", "product_id": "CSAFPID-230433" } }, { "category": "service_pack", "name": "7.3(2)D1(2)", "product": { "name": "7.3(2)D1(2)", "product_id": "CSAFPID-239439" } }, { "category": "service_pack", "name": "7.3(2)D1(3)", "product": { "name": "7.3(2)D1(3)", "product_id": "CSAFPID-256870" } }, { "category": "service_pack", "name": "7.3(2)D1(3a)", "product": { 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Switches", "product_id": "CSAFPID-277344:265090" }, "product_reference": "CSAFPID-277344", "relates_to_product_reference": "CSAFPID-265090" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(7)N1(1a) when installed on Cisco Nexus 6000 Series Switches", "product_id": "CSAFPID-277344:265094" }, "product_reference": "CSAFPID-277344", "relates_to_product_reference": "CSAFPID-265094" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(7)N1(1b) when installed on Cisco Nexus 5000 Series Switches", "product_id": "CSAFPID-277925:265090" }, "product_reference": "CSAFPID-277925", "relates_to_product_reference": "CSAFPID-265090" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(7)N1(1b) when installed on Cisco Nexus 6000 Series Switches", "product_id": "CSAFPID-277925:265094" }, "product_reference": "CSAFPID-277925", "relates_to_product_reference": "CSAFPID-265094" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1) when installed on Cisco Nexus 5000 Series Switches", "product_id": "CSAFPID-279341:265090" }, "product_reference": "CSAFPID-279341", "relates_to_product_reference": "CSAFPID-265090" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1) when installed on Cisco Nexus 6000 Series Switches", "product_id": "CSAFPID-279341:265094" }, "product_reference": "CSAFPID-279341", "relates_to_product_reference": "CSAFPID-265094" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1a) when installed on Cisco Nexus 5000 Series Switches", "product_id": "CSAFPID-283555:265090" }, "product_reference": "CSAFPID-283555", "relates_to_product_reference": "CSAFPID-265090" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1a) when installed on Cisco Nexus 6000 Series Switches", "product_id": "CSAFPID-283555:265094" }, "product_reference": "CSAFPID-283555", "relates_to_product_reference": "CSAFPID-265094" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1b) when installed on Cisco Nexus 5000 Series Switches", "product_id": "CSAFPID-284739:265090" }, "product_reference": "CSAFPID-284739", "relates_to_product_reference": "CSAFPID-265090" }, { "category": "installed_on", "full_product_name": { "name": "Cisco NX-OS Software 7.3(8)N1(1b) when installed on Cisco Nexus 6000 Series Switches", "product_id": "CSAFPID-284739:265094" }, "product_reference": "CSAFPID-284739", "relates_to_product_reference": "CSAFPID-265094" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-1590", "ids": [ { "system_name": "Cisco Bug ID", "text": "CSCuz49095" }, { "system_name": "Cisco Bug ID", "text": "CSCvw45963" }, { "system_name": "Cisco Bug ID", "text": "CSCvx74585" } ], "notes": [ { "category": "other", "text": "Complete.", "title": "Affected Product Comprehensiveness" } ], "product_status": { "known_affected": [ "CSAFPID-220737:265090", "CSAFPID-220737:265094", "CSAFPID-220741:265091", "CSAFPID-220741:265096", "CSAFPID-220742:265091", "CSAFPID-220742:265096", "CSAFPID-220743:265091", "CSAFPID-220743:265096", "CSAFPID-220744:265091", "CSAFPID-220744:265096", "CSAFPID-220745:265091", "CSAFPID-220745:265096", "CSAFPID-220746:265091", "CSAFPID-220746:265096", "CSAFPID-220747:265091", "CSAFPID-220747:265096", "CSAFPID-220748:265091", "CSAFPID-220748:265096", "CSAFPID-225659:265088", "CSAFPID-227352:265090", "CSAFPID-227352:265094", "CSAFPID-227356:265086", "CSAFPID-227356:265088", "CSAFPID-227357:265088", "CSAFPID-230429:265086", "CSAFPID-230429:265088", "CSAFPID-230433:265088", "CSAFPID-230435:265086", "CSAFPID-230435:265088", "CSAFPID-230436:265088", "CSAFPID-230437:265086", "CSAFPID-230437:265088", "CSAFPID-230438:265088", "CSAFPID-230439:265088", "CSAFPID-230440:265088", "CSAFPID-230441:265088", "CSAFPID-230442:265088", "CSAFPID-230443:265088", "CSAFPID-230446:265086", "CSAFPID-230448:265086", "CSAFPID-230467:265090", "CSAFPID-230467:265094", "CSAFPID-230468:265090", "CSAFPID-230468:265094", "CSAFPID-230469:265090", "CSAFPID-230469:265094", "CSAFPID-230527:265088", "CSAFPID-230528:265088", "CSAFPID-230554:265091", "CSAFPID-230554:265096", "CSAFPID-230567:265091", "CSAFPID-230567:265096", "CSAFPID-230568:265091", "CSAFPID-230568:265096", "CSAFPID-230569:265091", "CSAFPID-230569:265096", "CSAFPID-239439:265088", "CSAFPID-239440:265088", "CSAFPID-239441:265088", "CSAFPID-239442:265086", "CSAFPID-239442:265088", "CSAFPID-239445:265088", "CSAFPID-239500:265086", "CSAFPID-239501:265086", "CSAFPID-239502:265086", "CSAFPID-239503:265086", "CSAFPID-239504:265086", "CSAFPID-239510:265086", "CSAFPID-239639:265090", "CSAFPID-239639:265094", "CSAFPID-248858:265088", "CSAFPID-256870:265088", "CSAFPID-256871:265088", "CSAFPID-257397:265090", "CSAFPID-257397:265094", "CSAFPID-265097:265086", "CSAFPID-265098:265088", "CSAFPID-265101:265091", "CSAFPID-265101:265096", "CSAFPID-265102:265091", "CSAFPID-265102:265096", "CSAFPID-265103:265091", "CSAFPID-265103:265096", "CSAFPID-265104:265091", "CSAFPID-265104:265096", "CSAFPID-265105:265091", "CSAFPID-265105:265096", "CSAFPID-265106:265091", "CSAFPID-265106:265096", "CSAFPID-265122:265096", "CSAFPID-265123:265096", "CSAFPID-265124:265096", "CSAFPID-265125:265096", "CSAFPID-265126:265096", "CSAFPID-265129:265088", "CSAFPID-265130:265088", "CSAFPID-265131:265090", "CSAFPID-265131:265094", "CSAFPID-265132:265090", "CSAFPID-265132:265094", "CSAFPID-265135:265090", "CSAFPID-265135:265094", "CSAFPID-265137:265090", "CSAFPID-265137:265094", "CSAFPID-268938:265090", "CSAFPID-268938:265094", "CSAFPID-272929:265090", "CSAFPID-272929:265094", "CSAFPID-276893:265090", "CSAFPID-276893:265094", "CSAFPID-276904:265088", "CSAFPID-277344:265090", "CSAFPID-277344:265094", "CSAFPID-277925:265090", "CSAFPID-277925:265094", "CSAFPID-277926:265088", "CSAFPID-279341:265090", "CSAFPID-279341:265094", "CSAFPID-281979:265088", "CSAFPID-283555:265090", "CSAFPID-283555:265094", "CSAFPID-284739:265090", "CSAFPID-284739:265094", "CSAFPID-80720", "CSAFPID-112776" ] }, "release_date": "2021-08-25T16:00:00+00:00", "remediations": [ { "category": "vendor_fix", "details": "Cisco has released software updates that address this vulnerability.", "product_ids": [ "CSAFPID-112776", "CSAFPID-220737:265090", "CSAFPID-220737:265094", "CSAFPID-220741:265091", "CSAFPID-220741:265096", "CSAFPID-220742:265091", "CSAFPID-220742:265096", "CSAFPID-220743:265091", "CSAFPID-220743:265096", "CSAFPID-220744:265091", "CSAFPID-220744:265096", "CSAFPID-220745:265091", "CSAFPID-220745:265096", "CSAFPID-220746:265091", "CSAFPID-220746:265096", "CSAFPID-220747:265091", "CSAFPID-220747:265096", "CSAFPID-220748:265091", "CSAFPID-220748:265096", "CSAFPID-225659:265088", "CSAFPID-227352:265090", "CSAFPID-227352:265094", "CSAFPID-227356:265086", "CSAFPID-227356:265088", "CSAFPID-227357:265088", "CSAFPID-230429:265086", "CSAFPID-230429:265088", "CSAFPID-230433:265088", "CSAFPID-230435:265086", "CSAFPID-230435:265088", "CSAFPID-230436:265088", "CSAFPID-230437:265086", "CSAFPID-230437:265088", "CSAFPID-230438:265088", "CSAFPID-230439:265088", "CSAFPID-230440:265088", "CSAFPID-230441:265088", "CSAFPID-230442:265088", "CSAFPID-230443:265088", "CSAFPID-230446:265086", "CSAFPID-230448:265086", "CSAFPID-230467:265090", "CSAFPID-230467:265094", "CSAFPID-230468:265090", "CSAFPID-230468:265094", "CSAFPID-230469:265090", "CSAFPID-230469:265094", "CSAFPID-230527:265088", "CSAFPID-230528:265088", "CSAFPID-230554:265091", "CSAFPID-230554:265096", "CSAFPID-230567:265091", "CSAFPID-230567:265096", "CSAFPID-230568:265091", "CSAFPID-230568:265096", "CSAFPID-230569:265091", "CSAFPID-230569:265096", "CSAFPID-239439:265088", "CSAFPID-239440:265088", "CSAFPID-239441:265088", "CSAFPID-239442:265086", "CSAFPID-239442:265088", "CSAFPID-239445:265088", "CSAFPID-239500:265086", "CSAFPID-239501:265086", "CSAFPID-239502:265086", "CSAFPID-239503:265086", "CSAFPID-239504:265086", "CSAFPID-239510:265086", "CSAFPID-239639:265090", "CSAFPID-239639:265094", "CSAFPID-248858:265088", "CSAFPID-256870:265088", "CSAFPID-256871:265088", "CSAFPID-257397:265090", "CSAFPID-257397:265094", "CSAFPID-265097:265086", "CSAFPID-265098:265088", "CSAFPID-265101:265091", "CSAFPID-265101:265096", "CSAFPID-265102:265091", "CSAFPID-265102:265096", "CSAFPID-265103:265091", "CSAFPID-265103:265096", "CSAFPID-265104:265091", "CSAFPID-265104:265096", "CSAFPID-265105:265091", "CSAFPID-265105:265096", "CSAFPID-265106:265091", "CSAFPID-265106:265096", "CSAFPID-265122:265096", "CSAFPID-265123:265096", "CSAFPID-265124:265096", "CSAFPID-265125:265096", "CSAFPID-265126:265096", "CSAFPID-265129:265088", "CSAFPID-265130:265088", "CSAFPID-265131:265090", "CSAFPID-265131:265094", "CSAFPID-265132:265090", "CSAFPID-265132:265094", "CSAFPID-265135:265090", "CSAFPID-265135:265094", "CSAFPID-265137:265090", "CSAFPID-265137:265094", "CSAFPID-268938:265090", "CSAFPID-268938:265094", "CSAFPID-272929:265090", "CSAFPID-272929:265094", "CSAFPID-276893:265090", "CSAFPID-276893:265094", "CSAFPID-276904:265088", "CSAFPID-277344:265090", "CSAFPID-277344:265094", "CSAFPID-277925:265090", "CSAFPID-277925:265094", "CSAFPID-277926:265088", "CSAFPID-279341:265090", "CSAFPID-279341:265094", "CSAFPID-281979:265088", "CSAFPID-283555:265090", "CSAFPID-283555:265094", "CSAFPID-284739:265090", "CSAFPID-284739:265094", "CSAFPID-80720" ], "url": "https://software.cisco.com" } ], "scores": [ { "cvss_v3": { "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1" }, "products": [ "CSAFPID-220737:265090", "CSAFPID-220737:265094", "CSAFPID-220741:265091", "CSAFPID-220741:265096", "CSAFPID-220742:265091", "CSAFPID-220742:265096", "CSAFPID-220743:265091", "CSAFPID-220743:265096", "CSAFPID-220744:265091", "CSAFPID-220744:265096", "CSAFPID-220745:265091", "CSAFPID-220745:265096", "CSAFPID-220746:265091", "CSAFPID-220746:265096", "CSAFPID-220747:265091", "CSAFPID-220747:265096", "CSAFPID-220748:265091", "CSAFPID-220748:265096", "CSAFPID-225659:265088", "CSAFPID-227352:265090", "CSAFPID-227352:265094", "CSAFPID-227356:265086", "CSAFPID-227356:265088", "CSAFPID-227357:265088", "CSAFPID-230429:265086", "CSAFPID-230429:265088", "CSAFPID-230433:265088", "CSAFPID-230435:265086", "CSAFPID-230435:265088", "CSAFPID-230436:265088", "CSAFPID-230437:265086", "CSAFPID-230437:265088", "CSAFPID-230438:265088", "CSAFPID-230439:265088", "CSAFPID-230440:265088", "CSAFPID-230441:265088", "CSAFPID-230442:265088", "CSAFPID-230443:265088", "CSAFPID-230446:265086", "CSAFPID-230448:265086", "CSAFPID-230467:265090", "CSAFPID-230467:265094", "CSAFPID-230468:265090", "CSAFPID-230468:265094", "CSAFPID-230469:265090", "CSAFPID-230469:265094", "CSAFPID-230527:265088", "CSAFPID-230528:265088", "CSAFPID-230554:265091", "CSAFPID-230554:265096", "CSAFPID-230567:265091", "CSAFPID-230567:265096", "CSAFPID-230568:265091", "CSAFPID-230568:265096", "CSAFPID-230569:265091", "CSAFPID-230569:265096", "CSAFPID-239439:265088", "CSAFPID-239440:265088", "CSAFPID-239441:265088", "CSAFPID-239442:265086", "CSAFPID-239442:265088", "CSAFPID-239445:265088", "CSAFPID-239500:265086", "CSAFPID-239501:265086", "CSAFPID-239502:265086", "CSAFPID-239503:265086", "CSAFPID-239504:265086", "CSAFPID-239510:265086", "CSAFPID-239639:265090", "CSAFPID-239639:265094", "CSAFPID-248858:265088", "CSAFPID-256870:265088", "CSAFPID-256871:265088", "CSAFPID-257397:265090", "CSAFPID-257397:265094", "CSAFPID-265097:265086", "CSAFPID-265098:265088", "CSAFPID-265101:265091", "CSAFPID-265101:265096", "CSAFPID-265102:265091", "CSAFPID-265102:265096", "CSAFPID-265103:265091", "CSAFPID-265103:265096", "CSAFPID-265104:265091", "CSAFPID-265104:265096", "CSAFPID-265105:265091", "CSAFPID-265105:265096", "CSAFPID-265106:265091", "CSAFPID-265106:265096", "CSAFPID-265122:265096", "CSAFPID-265123:265096", "CSAFPID-265124:265096", "CSAFPID-265125:265096", "CSAFPID-265126:265096", "CSAFPID-265129:265088", "CSAFPID-265130:265088", "CSAFPID-265131:265090", "CSAFPID-265131:265094", "CSAFPID-265132:265090", "CSAFPID-265132:265094", "CSAFPID-265135:265090", "CSAFPID-265135:265094", "CSAFPID-265137:265090", "CSAFPID-265137:265094", "CSAFPID-268938:265090", "CSAFPID-268938:265094", "CSAFPID-272929:265090", "CSAFPID-272929:265094", "CSAFPID-276893:265090", "CSAFPID-276893:265094", "CSAFPID-276904:265088", "CSAFPID-277344:265090", "CSAFPID-277344:265094", "CSAFPID-277925:265090", "CSAFPID-277925:265094", "CSAFPID-277926:265088", "CSAFPID-279341:265090", "CSAFPID-279341:265094", "CSAFPID-281979:265088", "CSAFPID-283555:265090", "CSAFPID-283555:265094", "CSAFPID-284739:265090", "CSAFPID-284739:265094", "CSAFPID-80720", "CSAFPID-112776" ] } ], "title": "Cisco NX-OS System Software System Login Block-For Denial of Service Vulnerability " } ] }
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.