cisco-sa-nxos-ebgp-dos-l3qcwvj
Vulnerability from csaf_cisco
Published
2024-02-28 16:00
Modified
2024-02-28 16:00
Summary
Cisco NX-OS Software External Border Gateway Protocol Denial of Service Vulnerability
Notes
Summary
A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is part of the February 2024 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: February 2024 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75059"].
Vulnerable Products
This vulnerability affects Cisco Nexus 3600 Series Switches and Cisco Nexus 9500 R-Series Line Cards if they are running a vulnerable release of Cisco NX-OS Software, they have BGP functionality with at least one BGP neighbor (peer) that is configured with a different Autonomous System (AS) value, and they have one of the following Cisco product IDs:
N3K-C36180YC-R
N3K-C3636C-R
N9K-X9624D-R2
N9K-X9636C-R
N9K-X9636C-RX
N9K-X9636Q-R
N9K-X96136YC-R
Note: The list of affected Cisco Nexus 3600 Series Switch product IDs and Cisco Nexus 9500 R-Series Line Card product IDs was accurate at the time of publication. For specific questions about a product ID, contact the Cisco Technical Assistance Center (TAC).
For information about which Cisco software releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory.
Determine Whether BGP is Enabled
To determine whether a Cisco Nexus device is configured with the BGP feature and an eBGP neighbor, use the show running-config | include "router bgp" and show running-config | include "neighbor" commands from the Cisco NX-OS Software CLI and verify that the feature is enabled.
The following example shows the BGP feature enabled with one eBGP neighbor on a device that is running Cisco NX-OS Software:
nxos-switch# show running-config | include "router bgp"
router bgp 1
nxos-switch# show running-config | include "neighbor"
neighbor 10.10.10.2 remote-as 2
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
MDS 9000 Series Multilayer Switches
Nexus 1000 Virtual Edge for VMware vSphere
Nexus 1000V Switch for Microsoft Hyper-V
Nexus 1000V Switch for VMware vSphere
Nexus 3000 Series Switches, other than the models referenced in Vulnerable Products ["#vp"]
Nexus 5500 Platform Switches
Nexus 5600 Platform Switches
Nexus 6000 Series Switches
Nexus 7000 Series Switches
Nexus 9000 Series Fabric Switches in ACI mode
Nexus 9000 Series Switches in standalone NX-OS mode, other than the models referenced in Vulnerable Products ["#vp"]
Secure Firewall 3100 Series
Secure Firewall 4200 Series
UCS 6200 Series Fabric Interconnects
UCS 6300 Series Fabric Interconnects
UCS 6400 Series Fabric Interconnects
UCS 6500 Series Fabric Interconnects
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
Cisco has released free software updates ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu"] that address the vulnerability described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels.
Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html ["https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"]
Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
The Cisco Support and Downloads page ["https://www.cisco.com/c/en/us/support/index.html"] on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool.
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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"]
Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.
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"]. This tool identifies any Cisco security advisories that impact a specific 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 that the Software Checker identifies (“Combined First Fixed”).
To use the tool, go to the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] page and follow the instructions. Alternatively, use the following form to search for vulnerabilities that affect a specific software release. To use the form, follow these steps:
Choose which advisories the tool will search—only this advisory, only advisories with a Critical or High Security Impact Rating (SIR) ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr"], or all advisories.
Choose the appropriate software.
Choose the appropriate platform.
Enter a release number—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.
Click Check.
Only this advisory All Critical and High advisories All advisories Cisco NX-OS Software Cisco NX-OS Software in ACI Mode Any Platform 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
Nexus 3600 Series Switches and Nexus 9500 R-Series Line Cards SMUs
Cisco has released the following SMUs to address this vulnerability. Customers can download the SMUs from the Software Center ["https://software.cisco.com/download/home"] on Cisco.com.
Cisco NX-OS Software Release Platform SMU Name 9.3(12) Nexus 3600 Switches
Nexus 9500 R-Series Line Cards
nxos.CSCwh09703-n9k_ALL-1.0.0-9.3.12.lib32_n9000.rpm
10.2(6) Nexus 3600 Switches
Nexus 9500 R-Series Line Cards
nxos64-msll.CSCwh09703-1.0.0-10.2.6.lib32_64_n9000.rpm
10.3(4a) Nexus 9500 R-Series Line Cards1
nxos64-msll.CSCwh96478-1.0.0-10.3.4a.lib32_64_n9000.rpm
1. Only the N9K-X9636C-RX line card is affected when running Release 10.3(4a). All other models are not affected in this particular software release.
For details about downloading and installing SMUs in Cisco NX-OS Software for Cisco Nexus 3600 and 9500 Switches, see the Performing Software Maintenance Upgrades section of the Cisco NX-OS system management configuration guide for Cisco Nexus 3000 Series Switches ["https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus3000/101x/configuration/system-management/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-101x/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-93x_chapter_011000.html"] and Cisco Nexus 9000 Series Switches ["https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/101x/configuration/system-management/cisco-nexus-9000-series-nx-os-system-management-configuration-guide-101x/m-performing-smu.html"]
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 ["http://www.cisco.com/web/about/security/psirt/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 External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the February 2024 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: February 2024 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75059\"].",
"title": "Summary"
},
{
"category": "general",
"text": "This vulnerability affects Cisco Nexus 3600 Series Switches and Cisco Nexus 9500 R-Series Line Cards if they are running a vulnerable release of Cisco NX-OS Software, they have BGP functionality with at least one BGP neighbor (peer) that is configured with a different Autonomous System (AS) value, and they have one of the following Cisco product IDs:\r\n\r\nN3K-C36180YC-R\r\nN3K-C3636C-R\r\nN9K-X9624D-R2\r\nN9K-X9636C-R\r\nN9K-X9636C-RX\r\nN9K-X9636Q-R\r\nN9K-X96136YC-R\r\n\r\nNote: The list of affected Cisco Nexus 3600 Series Switch product IDs and Cisco Nexus 9500 R-Series Line Card product IDs was accurate at the time of publication. For specific questions about a product ID, contact the Cisco Technical Assistance Center (TAC).\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n Determine Whether BGP is Enabled\r\nTo determine whether a Cisco Nexus device is configured with the BGP feature and an eBGP neighbor, use the show running-config | include \"router bgp\" and show running-config | include \"neighbor\" commands from the Cisco NX-OS Software CLI and verify that the feature is enabled.\r\n\r\nThe following example shows the BGP feature enabled with one eBGP neighbor on a device that is running Cisco NX-OS Software:\r\n\r\n\r\nnxos-switch# show running-config | include \"router bgp\"\r\nrouter bgp 1\r\nnxos-switch# show running-config | include \"neighbor\"\r\nneighbor 10.10.10.2 remote-as 2",
"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\nMDS 9000 Series Multilayer Switches\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 3000 Series Switches, other than the models referenced in Vulnerable Products [\"#vp\"]\r\nNexus 5500 Platform Switches\r\nNexus 5600 Platform Switches\r\nNexus 6000 Series Switches\r\nNexus 7000 Series Switches\r\nNexus 9000 Series Fabric Switches in ACI mode\r\nNexus 9000 Series Switches in standalone NX-OS mode, other than the models referenced in Vulnerable Products [\"#vp\"]\r\nSecure Firewall 3100 Series\r\nSecure Firewall 4200 Series\r\nUCS 6200 Series Fabric Interconnects\r\nUCS 6300 Series Fabric Interconnects\r\nUCS 6400 Series Fabric Interconnects\r\nUCS 6500 Series Fabric Interconnects",
"title": "Products Confirmed Not Vulnerable"
},
{
"category": "general",
"text": "There are no workarounds that address this vulnerability.",
"title": "Workarounds"
},
{
"category": "general",
"text": "Cisco has released free software updates [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu\"] that address the vulnerability described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels.\r\n\r\nCustomers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:\r\nhttps://www.cisco.com/c/en/us/products/end-user-license-agreement.html [\"https://www.cisco.com/c/en/us/products/end-user-license-agreement.html\"]\r\n\r\nAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.\r\n\r\nThe Cisco Support and Downloads page [\"https://www.cisco.com/c/en/us/support/index.html\"] on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool.\r\n\r\nWhen 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 Customers Without Service Contracts\r\nCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"]\r\n\r\nCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.\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\"]. This tool identifies any Cisco security advisories that impact a specific 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 that the Software Checker identifies (\u201cCombined First Fixed\u201d).\r\n\r\nTo use the tool, go to the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] page and follow the instructions. Alternatively, use the following form to search for vulnerabilities that affect a specific software release. To use the form, follow these steps:\r\n\r\nChoose which advisories the tool will search\u2014only this advisory, only advisories with a Critical or High Security Impact Rating (SIR) [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr\"], or all advisories.\r\nChoose the appropriate software.\r\nChoose the appropriate platform.\r\nEnter a release number\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\nClick Check.\r\n\r\n Only this advisory All Critical and High advisories All advisories Cisco NX-OS Software Cisco NX-OS Software in ACI Mode Any Platform 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\n Nexus 3600 Series Switches and Nexus 9500 R-Series Line Cards SMUs\r\nCisco has released the following SMUs to address this vulnerability. Customers can download the SMUs from the Software Center [\"https://software.cisco.com/download/home\"] on Cisco.com.\r\n Cisco NX-OS Software Release Platform SMU Name 9.3(12) Nexus 3600 Switches\r\nNexus 9500 R-Series Line Cards\r\nnxos.CSCwh09703-n9k_ALL-1.0.0-9.3.12.lib32_n9000.rpm\r\n 10.2(6) Nexus 3600 Switches\r\nNexus 9500 R-Series Line Cards\r\nnxos64-msll.CSCwh09703-1.0.0-10.2.6.lib32_64_n9000.rpm\r\n 10.3(4a) Nexus 9500 R-Series Line Cards1\r\nnxos64-msll.CSCwh96478-1.0.0-10.3.4a.lib32_64_n9000.rpm\r\n\r\n1. Only the N9K-X9636C-RX line card is affected when running Release 10.3(4a). All other models are not affected in this particular software release.\r\nFor details about downloading and installing SMUs in Cisco NX-OS Software for Cisco Nexus 3600 and 9500 Switches, see the Performing Software Maintenance Upgrades section of the Cisco NX-OS system management configuration guide for Cisco Nexus 3000 Series Switches [\"https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus3000/101x/configuration/system-management/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-101x/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-93x_chapter_011000.html\"] and Cisco Nexus 9000 Series Switches [\"https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/101x/configuration/system-management/cisco-nexus-9000-series-nx-os-system-management-configuration-guide-101x/m-performing-smu.html\"]\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 [\"http://www.cisco.com/web/about/security/psirt/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": "psirt@cisco.com",
"issuing_authority": "Cisco PSIRT",
"name": "Cisco",
"namespace": "https://wwww.cisco.com"
},
"references": [
{
"category": "self",
"summary": "Cisco NX-OS Software External Border Gateway Protocol Denial of Service Vulnerability",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ"
},
{
"category": "external",
"summary": "Cisco Event Response: February 2024 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication",
"url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75059"
},
{
"category": "external",
"summary": "Cisco Security Vulnerability Policy",
"url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
},
{
"category": "external",
"summary": "free software updates",
"url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu"
},
{
"category": "external",
"summary": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html",
"url": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"
},
{
"category": "external",
"summary": "Cisco Support and Downloads page",
"url": "https://www.cisco.com/c/en/us/support/index.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 Security Advisories page",
"url": "https://www.cisco.com/go/psirt"
},
{
"category": "external",
"summary": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html",
"url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
},
{
"category": "external",
"summary": "Cisco Software Checker",
"url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"
},
{
"category": "external",
"summary": "Security Impact Rating (SIR)",
"url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr"
},
{
"category": "external",
"summary": "Software Center",
"url": "https://software.cisco.com/download/home"
},
{
"category": "external",
"summary": "Cisco Nexus 3000 Series Switches",
"url": "https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus3000/101x/configuration/system-management/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-101x/b-cisco-nexus-3000-series-nx-os-system-management-configuration-guide-93x_chapter_011000.html"
},
{
"category": "external",
"summary": "Cisco Nexus 9000 Series Switches",
"url": "https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/101x/configuration/system-management/cisco-nexus-9000-series-nx-os-system-management-configuration-guide-101x/m-performing-smu.html"
},
{
"category": "external",
"summary": "Cisco 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 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 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"
},
{
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"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 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 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 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 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 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": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
}
],
"title": "Cisco NX-OS Software External Border Gateway Protocol Denial of Service Vulnerability",
"tracking": {
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"generator": {
"date": "2024-05-10T23:29:05+00:00",
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"name": "Cisco NX-OS Software 10.3(2) when installed on Cisco Nexus 3000 Series Switches",
"product_id": "CSAFPID-292658:265091"
},
"product_reference": "CSAFPID-292658",
"relates_to_product_reference": "CSAFPID-265091"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(2) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-292658:265096"
},
"product_reference": "CSAFPID-292658",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(3) when installed on Cisco Nexus 3000 Series Switches",
"product_id": "CSAFPID-295511:265091"
},
"product_reference": "CSAFPID-295511",
"relates_to_product_reference": "CSAFPID-265091"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(3) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-295511:265096"
},
"product_reference": "CSAFPID-295511",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(99w) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-299969:265096"
},
"product_reference": "CSAFPID-299969",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(3w) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-300516:265096"
},
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},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(99x) when installed on Cisco Nexus 9000 Series Switches",
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},
"product_reference": "CSAFPID-300517",
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},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(3o) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-300741:265096"
},
"product_reference": "CSAFPID-300741",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(4a) when installed on Cisco Nexus 9000 Series Switches",
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},
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"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(3p) when installed on Cisco Nexus 9000 Series Switches",
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},
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},
{
"category": "installed_on",
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"name": "Cisco NX-OS Software 10.3(4) when installed on Cisco Nexus 9000 Series Switches",
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},
"product_reference": "CSAFPID-301024",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(3q) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-301106:265096"
},
"product_reference": "CSAFPID-301106",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(3x) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-301289:265096"
},
"product_reference": "CSAFPID-301289",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(4g) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-301720:265096"
},
"product_reference": "CSAFPID-301720",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(3r) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-302643:265096"
},
"product_reference": "CSAFPID-302643",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.3(4h) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-302884:265096"
},
"product_reference": "CSAFPID-302884",
"relates_to_product_reference": "CSAFPID-265096"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.4(1) when installed on Cisco Nexus 3000 Series Switches",
"product_id": "CSAFPID-300515:265091"
},
"product_reference": "CSAFPID-300515",
"relates_to_product_reference": "CSAFPID-265091"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Cisco NX-OS Software 10.4(1) when installed on Cisco Nexus 9000 Series Switches",
"product_id": "CSAFPID-300515:265096"
},
"product_reference": "CSAFPID-300515",
"relates_to_product_reference": "CSAFPID-265096"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2024-20321",
"ids": [
{
"system_name": "Cisco Bug ID",
"text": "CSCwh09703"
},
{
"system_name": "Cisco Bug ID",
"text": "CSCwh96478"
}
],
"notes": [
{
"category": "other",
"text": "Complete.",
"title": "Affected Product Comprehensiveness"
}
],
"product_status": {
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"CSAFPID-300748:265091",
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"CSAFPID-301720:265096",
"CSAFPID-302643:265096",
"CSAFPID-302884:265096"
]
},
"release_date": "2024-02-28T16:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "Cisco has released software updates that address this vulnerability.",
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"CSAFPID-288219:265091",
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"CSAFPID-290556:265091",
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"CSAFPID-294841:265091",
"CSAFPID-294841:265096",
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"CSAFPID-300515:265091",
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"CSAFPID-302643:265096",
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],
"url": "https://software.cisco.com"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.6,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
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"CSAFPID-284892:265096",
"CSAFPID-286098:265091",
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"CSAFPID-286439:265091",
"CSAFPID-286439:265096",
"CSAFPID-286833:265091",
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"CSAFPID-287105:265096",
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"CSAFPID-289309:265091",
"CSAFPID-289309:265096",
"CSAFPID-290556:265091",
"CSAFPID-290620:265091",
"CSAFPID-290620:265096",
"CSAFPID-292658:265091",
"CSAFPID-292658:265096",
"CSAFPID-292868:265091",
"CSAFPID-292868:265096",
"CSAFPID-294841:265091",
"CSAFPID-294841:265096",
"CSAFPID-295511:265091",
"CSAFPID-295511:265096",
"CSAFPID-299968:265091",
"CSAFPID-299968:265096",
"CSAFPID-299969:265096",
"CSAFPID-300117:265091",
"CSAFPID-300515:265091",
"CSAFPID-300515:265096",
"CSAFPID-300516:265096",
"CSAFPID-300517:265096",
"CSAFPID-300741:265096",
"CSAFPID-300748:265091",
"CSAFPID-300748:265096",
"CSAFPID-300941:265096",
"CSAFPID-300942:265096",
"CSAFPID-301024:265096",
"CSAFPID-301106:265096",
"CSAFPID-301289:265096",
"CSAFPID-301720:265096",
"CSAFPID-302643:265096",
"CSAFPID-302884:265096"
]
}
],
"title": "Cisco NX-OS Software External Border Gateway Protocol 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.