cisco-sa-ios-xe-l2tp-dos-eb5tufmv
Vulnerability from csaf_cisco
Published
2023-09-27 16:00
Modified
2023-09-27 16:00
Summary
Cisco IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability
Notes
Summary
A vulnerability in the Layer 2 Tunneling Protocol (L2TP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper handling of certain L2TP packets. An attacker could exploit this vulnerability by sending crafted L2TP packets to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.
Note: Only traffic directed to the affected system can be used to exploit this vulnerability.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is part of the September 2023 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2023 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74916"].
Vulnerable Products
This vulnerability affects the following software-based Cisco Packet Processor products if they are running a vulnerable release of Cisco IOS XE Software, have the L2TP feature enabled, and have active tunnels:
1000 Series Integrated Services Routers (ISRs)
1100 Integrated Services Routers
4000 Series Integrated Services Routers
Catalyst 8000V Edge Software
Catalyst 8200 Series Edge Platforms
Catalyst 8300 Series Edge Platforms
Catalyst 8500L Edge Platforms
Cloud Services Routers 1000V Series
Integrated Services Virtual Routers
VG400 Analog Voice Gateways
VG420 Analog Voice Gateways
VG450 Analog Voice Gateways
For information about which Cisco software releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory.
Determine the Device Configuration
To determine whether any L2TP tunnels are configured and active on a system, run the show l2tp tunnel command. If any L2TP tunnels are configured and running, the CLI output for Total tunnels will be at least 1, as shown in the following example:
Router1# show l2tp tunnel
L2TP Tunnel Information Total tunnels 1 sessions 1
LocTunID RemTunID Remote Name State Remote Address Sessn Count L2TP Class/
VPDN Group
62521 22809 Router2 est 1.1.1.1 1 cisco
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 all Cisco ASR 1000 Series Aggregation Services Routers that are running Cisco IOS XE Software are not affected by this vulnerability.
Cisco has also confirmed that this vulnerability does not affect the following Cisco products:
IOS Software
IOS XR Software
Meraki products
NX-OS Software
Workarounds
There are no workarounds that address this vulnerability.
However, to reduce the attack surface, administrators may apply infrastructure access control lists (iACLs) to block UDP port 1701 on interfaces where L2TP packets are not expected to be received. The following is an iACL example that can be included as part of the deployed iACL:
Router# show ip access-lists CVE-2023-20227
10 deny udp any INFRASTRUCTURE_ADDRESSES WILDCARD eq 1701
20 permit ip any any
Router#
For more guidelines and recommendations for deployment techniques for iACLs, see the white paper Protecting Your Core: Infrastructure Protection Access Control Lists ["https://www.cisco.com/c/en/us/support/docs/ip/access-lists/43920-iacl.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
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 IOS and IOS XE Software
To help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE 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 that are 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 determine whether a release is affected by any Cisco Security Advisory. 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.
Enter a release number—for example, 15.9(3)M2 or 17.3.3.
Click Check.
Only this advisory All Critical and High advisories All advisories
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 Layer 2 Tunneling Protocol (L2TP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper handling of certain L2TP packets. An attacker could exploit this vulnerability by sending crafted L2TP packets to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\n\r\nNote: Only traffic directed to the affected system can be used to exploit this vulnerability.\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 September 2023 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2023 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74916\"].", "title": "Summary" }, { "category": "general", "text": "This vulnerability affects the following software-based Cisco Packet Processor products if they are running a vulnerable release of Cisco IOS XE Software, have the L2TP feature enabled, and have active tunnels:\r\n\r\n1000 Series Integrated Services Routers (ISRs)\r\n1100 Integrated Services Routers\r\n4000 Series Integrated Services Routers\r\nCatalyst 8000V Edge Software\r\nCatalyst 8200 Series Edge Platforms\r\nCatalyst 8300 Series Edge Platforms\r\nCatalyst 8500L Edge Platforms\r\nCloud Services Routers 1000V Series\r\nIntegrated Services Virtual Routers\r\nVG400 Analog Voice Gateways\r\nVG420 Analog Voice Gateways\r\nVG450 Analog Voice Gateways\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n Determine the Device Configuration\r\nTo determine whether any L2TP tunnels are configured and active on a system, run the show l2tp tunnel command. If any L2TP tunnels are configured and running, the CLI output for Total tunnels will be at least 1, as shown in the following example:\r\n\r\n\r\nRouter1# show l2tp tunnel\r\nL2TP Tunnel Information Total tunnels 1 sessions 1\r\nLocTunID RemTunID Remote Name State Remote Address Sessn Count L2TP Class/\r\nVPDN Group\r\n62521 22809 Router2 est 1.1.1.1 1 cisco", "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 all Cisco ASR 1000 Series Aggregation Services Routers that are running Cisco IOS XE Software are not affected by this vulnerability.\r\n\r\nCisco has also confirmed that this vulnerability does not affect the following Cisco products:\r\n\r\nIOS Software\r\nIOS XR Software\r\nMeraki products\r\nNX-OS Software", "title": "Products Confirmed Not Vulnerable" }, { "category": "general", "text": "There are no workarounds that address this vulnerability.\r\n\r\nHowever, to reduce the attack surface, administrators may apply infrastructure access control lists (iACLs) to block UDP port 1701 on interfaces where L2TP packets are not expected to be received. The following is an iACL example that can be included as part of the deployed iACL:\r\n\r\n\r\nRouter# show ip access-lists CVE-2023-20227\r\n10 deny udp any INFRASTRUCTURE_ADDRESSES WILDCARD eq 1701\r\n20 permit ip any any\r\nRouter#\r\n\r\nFor more guidelines and recommendations for deployment techniques for iACLs, see the white paper Protecting Your Core: Infrastructure Protection Access Control Lists [\"https://www.cisco.com/c/en/us/support/docs/ip/access-lists/43920-iacl.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": "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 IOS and IOS XE Software\r\nTo help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE 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 that are 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 determine whether a release is affected by any Cisco Security Advisory. 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\nEnter a release number\u2014for example, 15.9(3)M2 or 17.3.3.\r\nClick Check.\r\n\r\n Only this advisory All Critical and High advisories All advisories", "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 IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xe-l2tp-dos-eB5tuFmV" }, { "category": "external", "summary": "Cisco Event Response: September 2023 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication", "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74916" }, { "category": "external", "summary": "Cisco Security Vulnerability Policy", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html" }, { "category": "external", "summary": "Protecting Your Core: Infrastructure Protection Access Control Lists", "url": "https://www.cisco.com/c/en/us/support/docs/ip/access-lists/43920-iacl.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": "Security Vulnerability Policy", "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html" } ], "title": "Cisco IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability", "tracking": { "current_release_date": "2023-09-27T16:00:00+00:00", "generator": { "date": "2024-05-10T23:27:06+00:00", "engine": { "name": "TVCE" } }, "id": "cisco-sa-ios-xe-l2tp-dos-eB5tuFmV", "initial_release_date": "2023-09-27T16:00:00+00:00", "revision_history": [ { "date": "2023-09-27T15:51:14+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": "16.8.1", "product": { "name": "16.8.1", "product_id": "CSAFPID-218905" } }, { "category": "service_pack", "name": "16.8.1a", "product": { "name": "16.8.1a", "product_id": "CSAFPID-235307" } }, { "category": "service_pack", "name": "16.8.1b", "product": { "name": "16.8.1b", "product_id": "CSAFPID-235858" } }, { "category": "service_pack", "name": "16.8.1s", "product": { "name": "16.8.1s", "product_id": "CSAFPID-236834" } }, { "category": "service_pack", "name": "16.8.1c", "product": { "name": "16.8.1c", "product_id": "CSAFPID-237460" } }, { "category": "service_pack", "name": "16.8.1d", "product": { "name": "16.8.1d", "product_id": "CSAFPID-242834" } }, { "category": "service_pack", "name": "16.8.2", "product": { "name": "16.8.2", "product_id": "CSAFPID-244071" } }, { "category": "service_pack", "name": "16.8.1e", "product": { "name": "16.8.1e", "product_id": "CSAFPID-249171" } }, { "category": "service_pack", "name": "16.8.3", "product": { "name": "16.8.3", "product_id": "CSAFPID-257984" } } ], "category": "product_version", "name": "16.8" }, { "branches": [ { "category": "service_pack", "name": "16.9.1", "product": { "name": "16.9.1", "product_id": "CSAFPID-225856" } }, { "category": "service_pack", "name": "16.9.2", "product": { "name": "16.9.2", "product_id": "CSAFPID-232008" } }, { "category": "service_pack", "name": "16.9.1a", "product": { "name": "16.9.1a", "product_id": "CSAFPID-242308" } }, { "category": "service_pack", "name": "16.9.1b", "product": { "name": "16.9.1b", "product_id": "CSAFPID-243362" } }, { "category": "service_pack", "name": "16.9.1s", "product": { "name": "16.9.1s", "product_id": "CSAFPID-244530" } }, { "category": "service_pack", "name": "16.9.1c", "product": { "name": "16.9.1c", "product_id": "CSAFPID-245375" } }, { "category": "service_pack", "name": "16.9.3", "product": { "name": "16.9.3", "product_id": "CSAFPID-251075" } }, { "category": "service_pack", "name": "16.9.2a", "product": { "name": "16.9.2a", "product_id": "CSAFPID-251166" } }, { "category": "service_pack", "name": "16.9.2s", "product": { "name": "16.9.2s", "product_id": "CSAFPID-252272" } }, { "category": "service_pack", "name": "16.9.3h", "product": { "name": "16.9.3h", "product_id": "CSAFPID-258229" } }, { "category": "service_pack", "name": "16.9.4", "product": { "name": "16.9.4", "product_id": "CSAFPID-262390" } }, { "category": "service_pack", "name": "16.9.3s", "product": { "name": "16.9.3s", "product_id": "CSAFPID-262549" } }, { "category": "service_pack", "name": "16.9.4c", "product": { "name": "16.9.4c", "product_id": "CSAFPID-268921" } }, { "category": "service_pack", "name": "16.9.5", "product": { "name": "16.9.5", "product_id": "CSAFPID-271798" } }, { "category": "service_pack", "name": "16.9.5f", "product": { "name": "16.9.5f", "product_id": "CSAFPID-276837" } }, { "category": "service_pack", "name": "16.9.6", "product": { "name": "16.9.6", "product_id": "CSAFPID-277945" } }, { "category": "service_pack", "name": "16.9.7", "product": { "name": "16.9.7", "product_id": "CSAFPID-280651" } }, { "category": "service_pack", "name": "16.9.8", "product": { "name": "16.9.8", "product_id": "CSAFPID-280938" } }, { "category": "service_pack", "name": "16.9.8a", "product": { "name": "16.9.8a", "product_id": "CSAFPID-290562" } }, { "category": "service_pack", "name": "16.9.8b", "product": { "name": "16.9.8b", "product_id": "CSAFPID-290669" } } ], "category": "product_version", "name": "16.9" }, { "branches": [ { "category": "service_pack", "name": "16.10.1", "product": { "name": "16.10.1", "product_id": "CSAFPID-225858" } }, { "category": "service_pack", "name": "16.10.1a", "product": { "name": "16.10.1a", "product_id": "CSAFPID-250629" } }, { "category": "service_pack", "name": "16.10.1b", "product": { "name": "16.10.1b", "product_id": "CSAFPID-252045" } }, { "category": "service_pack", "name": "16.10.1s", "product": { "name": "16.10.1s", "product_id": "CSAFPID-252913" } }, { "category": "service_pack", "name": "16.10.1c", "product": { "name": "16.10.1c", "product_id": "CSAFPID-254688" } }, { "category": "service_pack", "name": "16.10.1e", "product": { "name": "16.10.1e", "product_id": "CSAFPID-257955" } }, { "category": "service_pack", "name": "16.10.1d", "product": { "name": "16.10.1d", "product_id": "CSAFPID-258900" } }, { "category": "service_pack", "name": "16.10.2", "product": { "name": "16.10.2", "product_id": "CSAFPID-260917" } }, { "category": "service_pack", "name": "16.10.1f", "product": { "name": "16.10.1f", "product_id": "CSAFPID-262595" } }, { "category": "service_pack", "name": "16.10.1g", "product": { "name": "16.10.1g", "product_id": "CSAFPID-266259" } }, { "category": "service_pack", "name": "16.10.3", "product": { "name": "16.10.3", "product_id": "CSAFPID-273112" } } ], "category": "product_version", "name": "16.10" }, { "branches": [ { "category": "service_pack", "name": "16.11.1", "product": { "name": "16.11.1", "product_id": "CSAFPID-227918" } }, { "category": "service_pack", "name": "16.11.1a", "product": { "name": "16.11.1a", "product_id": "CSAFPID-252271" } }, { "category": "service_pack", "name": "16.11.1b", "product": { "name": "16.11.1b", "product_id": "CSAFPID-260741" } }, { "category": "service_pack", "name": "16.11.2", "product": { "name": "16.11.2", "product_id": "CSAFPID-261240" } }, { "category": "service_pack", "name": "16.11.1s", "product": { "name": "16.11.1s", "product_id": "CSAFPID-261465" } }, { "category": "service_pack", "name": "16.11.1c", "product": { "name": "16.11.1c", "product_id": "CSAFPID-264096" } } ], "category": "product_version", "name": "16.11" }, { "branches": [ { "category": "service_pack", "name": "16.12.1", "product": { "name": "16.12.1", "product_id": "CSAFPID-227920" } }, { "category": "service_pack", "name": "16.12.1s", "product": { "name": "16.12.1s", "product_id": "CSAFPID-265735" } }, { "category": "service_pack", "name": "16.12.1a", "product": { "name": "16.12.1a", "product_id": "CSAFPID-265841" } }, { "category": "service_pack", "name": "16.12.1c", "product": { "name": "16.12.1c", "product_id": "CSAFPID-267110" } }, { "category": "service_pack", "name": "16.12.1w", "product": { "name": "16.12.1w", "product_id": "CSAFPID-267240" } }, { "category": "service_pack", "name": "16.12.2", "product": { "name": "16.12.2", "product_id": "CSAFPID-267605" } }, { "category": "service_pack", "name": "16.12.1y", "product": { "name": "16.12.1y", "product_id": "CSAFPID-271938" } }, { "category": "service_pack", "name": "16.12.2a", "product": { "name": "16.12.2a", "product_id": "CSAFPID-272047" } }, { "category": "service_pack", "name": "16.12.3", "product": { "name": "16.12.3", "product_id": "CSAFPID-273445" } }, { "category": "service_pack", "name": "16.12.8", "product": { "name": "16.12.8", "product_id": "CSAFPID-273448" } }, { "category": "service_pack", "name": "16.12.2s", "product": { "name": "16.12.2s", "product_id": "CSAFPID-273509" } }, { "category": "service_pack", "name": "16.12.1x", "product": { "name": "16.12.1x", "product_id": "CSAFPID-273649" } }, { "category": "service_pack", "name": "16.12.1t", "product": { "name": "16.12.1t", "product_id": "CSAFPID-274832" } }, { "category": "service_pack", "name": "16.12.2t", "product": { "name": "16.12.2t", "product_id": "CSAFPID-275538" } }, { "category": "service_pack", "name": "16.12.4", "product": { "name": "16.12.4", "product_id": "CSAFPID-277147" } }, { "category": "service_pack", "name": "16.12.3s", "product": { "name": "16.12.3s", "product_id": "CSAFPID-277255" } }, { "category": "service_pack", "name": "16.12.1z", "product": { "name": "16.12.1z", "product_id": "CSAFPID-277256" } }, { "category": "service_pack", "name": "16.12.4a", "product": { "name": "16.12.4a", "product_id": "CSAFPID-278881" } }, { "category": "service_pack", "name": "16.12.5", "product": { "name": "16.12.5", "product_id": "CSAFPID-280463" } }, { "category": "service_pack", "name": "16.12.6", "product": { "name": "16.12.6", "product_id": "CSAFPID-280937" } }, { "category": "service_pack", "name": "16.12.1z1", "product": { "name": "16.12.1z1", "product_id": "CSAFPID-281320" } }, { "category": "service_pack", "name": "16.12.5a", "product": { "name": "16.12.5a", "product_id": "CSAFPID-281438" } }, { "category": "service_pack", "name": "16.12.1z2", "product": { "name": "16.12.1z2", "product_id": "CSAFPID-283831" } }, { "category": "service_pack", "name": "16.12.6a", "product": { "name": "16.12.6a", "product_id": "CSAFPID-285325" } }, { "category": "service_pack", "name": "16.12.7", "product": { "name": "16.12.7", "product_id": "CSAFPID-286031" } }, { "category": "service_pack", "name": "16.12.10a", "product": { "name": "16.12.10a", "product_id": "CSAFPID-300877" } } ], "category": "product_version", "name": "16.12" }, { "branches": [ { "category": "service_pack", "name": "17.1.1", "product": { "name": "17.1.1", "product_id": "CSAFPID-245377" } }, { "category": "service_pack", "name": "17.1.1a", "product": { "name": "17.1.1a", "product_id": "CSAFPID-272932" } }, { "category": "service_pack", "name": "17.1.1s", "product": { "name": "17.1.1s", "product_id": "CSAFPID-274818" } }, { "category": "service_pack", "name": "17.1.2", "product": { "name": "17.1.2", "product_id": "CSAFPID-277338" } }, { "category": "service_pack", "name": "17.1.1t", "product": { "name": "17.1.1t", "product_id": "CSAFPID-277348" } }, { "category": "service_pack", "name": "17.1.3", "product": { "name": "17.1.3", "product_id": "CSAFPID-280652" } } ], "category": "product_version", "name": "17.1" }, { "branches": [ { "category": "service_pack", "name": "17.2.1", "product": { "name": "17.2.1", "product_id": "CSAFPID-251225" } }, { "category": "service_pack", "name": "17.2.1r", "product": { "name": "17.2.1r", "product_id": "CSAFPID-277194" } }, { "category": "service_pack", "name": "17.2.1a", "product": { "name": "17.2.1a", "product_id": "CSAFPID-277343" } }, { "category": "service_pack", "name": "17.2.1v", "product": { "name": "17.2.1v", "product_id": "CSAFPID-278002" } }, { "category": "service_pack", "name": "17.2.2", "product": { "name": "17.2.2", "product_id": "CSAFPID-278504" } }, { "category": "service_pack", "name": "17.2.3", "product": { "name": "17.2.3", "product_id": "CSAFPID-280939" } } ], "category": "product_version", "name": "17.2" }, { "branches": [ { "category": "service_pack", "name": "17.3.1", "product": { "name": "17.3.1", "product_id": "CSAFPID-254712" } }, { "category": "service_pack", "name": "17.3.2", "product": { "name": "17.3.2", "product_id": "CSAFPID-277099" } }, { "category": "service_pack", "name": "17.3.3", "product": { "name": "17.3.3", "product_id": "CSAFPID-278019" } }, { "category": "service_pack", "name": "17.3.1a", "product": { "name": "17.3.1a", "product_id": "CSAFPID-279338" } }, { "category": "service_pack", "name": "17.3.1w", "product": { "name": "17.3.1w", "product_id": "CSAFPID-279339" } }, { "category": "service_pack", "name": "17.3.2a", "product": { "name": "17.3.2a", "product_id": "CSAFPID-280555" } }, { "category": "service_pack", "name": "17.3.1x", "product": { "name": "17.3.1x", "product_id": "CSAFPID-280783" } }, { "category": "service_pack", "name": "17.3.1z", "product": { "name": "17.3.1z", "product_id": "CSAFPID-281331" } }, { "category": "service_pack", "name": "17.3.4", "product": { "name": "17.3.4", "product_id": "CSAFPID-282028" } }, { "category": "service_pack", "name": "17.3.5", "product": { "name": "17.3.5", "product_id": "CSAFPID-282115" } }, { "category": "service_pack", "name": "17.3.4a", "product": { "name": "17.3.4a", "product_id": "CSAFPID-284178" } }, { "category": "service_pack", "name": "17.3.6", "product": { "name": "17.3.6", "product_id": "CSAFPID-284331" } }, { "category": "service_pack", "name": "17.3.4c", "product": { "name": "17.3.4c", "product_id": "CSAFPID-285327" } }, { "category": "service_pack", "name": "17.3.5a", "product": { "name": "17.3.5a", "product_id": "CSAFPID-286498" } }, { "category": "service_pack", "name": "17.3.5b", "product": { "name": "17.3.5b", "product_id": "CSAFPID-287125" } }, { "category": "service_pack", "name": "17.3.7", "product": { "name": "17.3.7", "product_id": "CSAFPID-290671" } } ], "category": "product_version", "name": "17.3" }, { "branches": [ { "category": "service_pack", "name": "17.4.1", "product": { "name": "17.4.1", "product_id": "CSAFPID-262588" } }, { "category": "service_pack", "name": "17.4.2", "product": { "name": "17.4.2", "product_id": "CSAFPID-278020" } }, { "category": "service_pack", "name": "17.4.1a", "product": { "name": "17.4.1a", "product_id": "CSAFPID-280770" } }, { "category": "service_pack", "name": "17.4.1b", "product": { "name": "17.4.1b", "product_id": "CSAFPID-280899" } }, { "category": "service_pack", "name": "17.4.2a", "product": { "name": "17.4.2a", "product_id": "CSAFPID-285328" } } ], "category": "product_version", "name": "17.4" }, { "branches": [ { "category": "service_pack", "name": "17.5.1", "product": { "name": "17.5.1", "product_id": "CSAFPID-262590" } }, { "category": "service_pack", "name": "17.5.1a", "product": { "name": "17.5.1a", "product_id": "CSAFPID-282046" } }, { "category": "service_pack", "name": "17.5.1b", "product": { "name": "17.5.1b", "product_id": "CSAFPID-290596" } }, { "category": "service_pack", "name": "17.5.1c", "product": { "name": "17.5.1c", "product_id": "CSAFPID-292698" } } ], "category": "product_version", "name": "17.5" } ], "category": "product_family", "name": "Cisco IOS XE Software" } ], "category": "vendor", "name": "Cisco" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-20227", "ids": [ { "system_name": "Cisco Bug ID", "text": "CSCwe70596" } ], "notes": [ { "category": "other", "text": "Complete.", "title": "Affected Product Comprehensiveness" } ], "product_status": { "known_affected": [ "CSAFPID-218905", "CSAFPID-225856", "CSAFPID-225858", "CSAFPID-227918", "CSAFPID-227920", "CSAFPID-232008", "CSAFPID-235307", "CSAFPID-235858", "CSAFPID-236834", "CSAFPID-237460", "CSAFPID-242308", "CSAFPID-242834", "CSAFPID-243362", "CSAFPID-244071", "CSAFPID-244530", "CSAFPID-245375", "CSAFPID-245377", "CSAFPID-249171", "CSAFPID-250629", "CSAFPID-251075", "CSAFPID-251166", "CSAFPID-251225", "CSAFPID-252045", "CSAFPID-252271", "CSAFPID-252272", "CSAFPID-252913", "CSAFPID-254688", "CSAFPID-254712", "CSAFPID-257955", "CSAFPID-257984", "CSAFPID-258229", "CSAFPID-258900", "CSAFPID-260741", "CSAFPID-260917", "CSAFPID-261240", "CSAFPID-261465", "CSAFPID-262390", "CSAFPID-262549", "CSAFPID-262588", "CSAFPID-262590", "CSAFPID-262595", "CSAFPID-264096", "CSAFPID-265735", "CSAFPID-265841", "CSAFPID-266259", "CSAFPID-267110", "CSAFPID-267240", "CSAFPID-267605", "CSAFPID-268921", "CSAFPID-271798", "CSAFPID-271938", "CSAFPID-272047", "CSAFPID-272932", "CSAFPID-273112", "CSAFPID-273445", "CSAFPID-273448", "CSAFPID-273509", "CSAFPID-273649", "CSAFPID-274818", "CSAFPID-274832", "CSAFPID-275538", "CSAFPID-276837", "CSAFPID-277099", "CSAFPID-277147", "CSAFPID-277194", "CSAFPID-277255", "CSAFPID-277256", "CSAFPID-277338", "CSAFPID-277343", "CSAFPID-277348", "CSAFPID-277945", "CSAFPID-278002", "CSAFPID-278019", "CSAFPID-278020", "CSAFPID-278504", "CSAFPID-278881", "CSAFPID-279338", "CSAFPID-279339", "CSAFPID-280463", "CSAFPID-280555", "CSAFPID-280651", "CSAFPID-280652", "CSAFPID-280770", "CSAFPID-280783", "CSAFPID-280899", "CSAFPID-280937", "CSAFPID-280938", "CSAFPID-280939", "CSAFPID-281320", "CSAFPID-281331", "CSAFPID-281438", "CSAFPID-282028", "CSAFPID-282046", "CSAFPID-282115", "CSAFPID-283831", "CSAFPID-284178", "CSAFPID-284331", "CSAFPID-285325", "CSAFPID-285327", "CSAFPID-285328", "CSAFPID-286031", "CSAFPID-286498", "CSAFPID-287125", "CSAFPID-290562", "CSAFPID-290596", "CSAFPID-290669", "CSAFPID-290671", "CSAFPID-292698", "CSAFPID-300877" ] }, "release_date": "2023-09-27T16:00:00+00:00", "remediations": [ { "category": "vendor_fix", "details": "Cisco has released software updates that address this vulnerability.", "product_ids": [ "CSAFPID-218905", "CSAFPID-225856", "CSAFPID-225858", "CSAFPID-227918", "CSAFPID-227920", "CSAFPID-232008", "CSAFPID-235307", "CSAFPID-235858", "CSAFPID-236834", "CSAFPID-237460", "CSAFPID-242308", "CSAFPID-242834", "CSAFPID-243362", "CSAFPID-244071", "CSAFPID-244530", "CSAFPID-245375", "CSAFPID-245377", "CSAFPID-249171", "CSAFPID-250629", "CSAFPID-251075", "CSAFPID-251166", "CSAFPID-251225", "CSAFPID-252045", "CSAFPID-252271", "CSAFPID-252272", "CSAFPID-252913", "CSAFPID-254688", "CSAFPID-254712", "CSAFPID-257955", "CSAFPID-257984", "CSAFPID-258229", "CSAFPID-258900", "CSAFPID-260741", "CSAFPID-260917", "CSAFPID-261240", "CSAFPID-261465", "CSAFPID-262390", "CSAFPID-262549", "CSAFPID-262588", "CSAFPID-262590", "CSAFPID-262595", "CSAFPID-264096", "CSAFPID-265735", "CSAFPID-265841", "CSAFPID-266259", "CSAFPID-267110", "CSAFPID-267240", "CSAFPID-267605", "CSAFPID-268921", "CSAFPID-271798", "CSAFPID-271938", "CSAFPID-272047", "CSAFPID-272932", "CSAFPID-273112", "CSAFPID-273445", "CSAFPID-273448", "CSAFPID-273509", "CSAFPID-273649", "CSAFPID-274818", "CSAFPID-274832", "CSAFPID-275538", "CSAFPID-276837", "CSAFPID-277099", "CSAFPID-277147", "CSAFPID-277194", "CSAFPID-277255", "CSAFPID-277256", "CSAFPID-277338", "CSAFPID-277343", "CSAFPID-277348", "CSAFPID-277945", "CSAFPID-278002", "CSAFPID-278019", "CSAFPID-278020", "CSAFPID-278504", "CSAFPID-278881", "CSAFPID-279338", "CSAFPID-279339", "CSAFPID-280463", "CSAFPID-280555", "CSAFPID-280651", "CSAFPID-280652", "CSAFPID-280770", "CSAFPID-280783", "CSAFPID-280899", "CSAFPID-280937", "CSAFPID-280938", "CSAFPID-280939", "CSAFPID-281320", "CSAFPID-281331", "CSAFPID-281438", "CSAFPID-282028", "CSAFPID-282046", "CSAFPID-282115", "CSAFPID-283831", "CSAFPID-284178", "CSAFPID-284331", "CSAFPID-285325", "CSAFPID-285327", "CSAFPID-285328", "CSAFPID-286031", "CSAFPID-286498", "CSAFPID-287125", "CSAFPID-290562", "CSAFPID-290596", "CSAFPID-290669", "CSAFPID-290671", "CSAFPID-292698", "CSAFPID-300877" ], "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": [ "CSAFPID-218905", "CSAFPID-225856", "CSAFPID-225858", "CSAFPID-227918", "CSAFPID-227920", "CSAFPID-232008", "CSAFPID-235307", "CSAFPID-235858", "CSAFPID-236834", "CSAFPID-237460", "CSAFPID-242308", "CSAFPID-242834", "CSAFPID-243362", "CSAFPID-244071", "CSAFPID-244530", "CSAFPID-245375", "CSAFPID-245377", "CSAFPID-249171", "CSAFPID-250629", "CSAFPID-251075", "CSAFPID-251166", "CSAFPID-251225", "CSAFPID-252045", "CSAFPID-252271", "CSAFPID-252272", "CSAFPID-252913", "CSAFPID-254688", "CSAFPID-254712", "CSAFPID-257955", "CSAFPID-257984", "CSAFPID-258229", "CSAFPID-258900", "CSAFPID-260741", "CSAFPID-260917", "CSAFPID-261240", "CSAFPID-261465", "CSAFPID-262390", "CSAFPID-262549", "CSAFPID-262588", "CSAFPID-262590", "CSAFPID-262595", "CSAFPID-264096", "CSAFPID-265735", "CSAFPID-265841", "CSAFPID-266259", "CSAFPID-267110", "CSAFPID-267240", "CSAFPID-267605", "CSAFPID-268921", "CSAFPID-271798", "CSAFPID-271938", "CSAFPID-272047", "CSAFPID-272932", "CSAFPID-273112", "CSAFPID-273445", "CSAFPID-273448", "CSAFPID-273509", "CSAFPID-273649", "CSAFPID-274818", "CSAFPID-274832", "CSAFPID-275538", "CSAFPID-276837", "CSAFPID-277099", "CSAFPID-277147", "CSAFPID-277194", "CSAFPID-277255", "CSAFPID-277256", "CSAFPID-277338", "CSAFPID-277343", "CSAFPID-277348", "CSAFPID-277945", "CSAFPID-278002", "CSAFPID-278019", "CSAFPID-278020", "CSAFPID-278504", "CSAFPID-278881", "CSAFPID-279338", "CSAFPID-279339", "CSAFPID-280463", "CSAFPID-280555", "CSAFPID-280651", "CSAFPID-280652", "CSAFPID-280770", "CSAFPID-280783", "CSAFPID-280899", "CSAFPID-280937", "CSAFPID-280938", "CSAFPID-280939", "CSAFPID-281320", "CSAFPID-281331", "CSAFPID-281438", "CSAFPID-282028", "CSAFPID-282046", "CSAFPID-282115", "CSAFPID-283831", "CSAFPID-284178", "CSAFPID-284331", "CSAFPID-285325", "CSAFPID-285327", "CSAFPID-285328", "CSAFPID-286031", "CSAFPID-286498", "CSAFPID-287125", "CSAFPID-290562", "CSAFPID-290596", "CSAFPID-290669", "CSAFPID-290671", "CSAFPID-292698", "CSAFPID-300877" ] } ], "title": "Cisco IOS XE Software Layer Two Tunneling 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.