==================================================================== CERT-Renater Note d'Information No. 2020/VULN040 _____________________________________________________________________ DATE : 23/01/2020 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Cisco IOS XR Software versions prior to 6.63, 7.02, 7.1.1, 7.2.1. ===================================================================== https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-evpn _____________________________________________________________________ Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnerability High Advisory ID: cisco-sa-20200122-ios-xr-dos First Published: 2020 January 22 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvr62342 CVSS Score: Base 7.7 CVE-2019-16027 CWE-20 Summary A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition in the IS–IS process. The vulnerability is due to improper handling of a Simple Network Management Protocol (SNMP) request for specific Object Identifiers (OIDs) by the IS–IS process. An attacker could exploit this vulnerability by sending a crafted SNMP request to the affected device. A successful exploit could allow the attacker to cause a DoS condition in the IS–IS process. 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos Affected Products Vulnerable Products This vulnerability affects Cisco devices if they are running Cisco IOS XR Software releases earlier than 6.6.3, 7.0.2, 7.1.1, or 7.2.1 and they configured with both the IS–IS routing protocol and SNMP versions 1, 2c, or 3. Cisco has confirmed that this vulnerability affects both Cisco IOS XR 32-bit Software and Cisco IOS XR 64-bit Software. Determine Whether the Device Has a Vulnerable Configuration To determine if the device is configured for IS–IS routing, administrators can use the show running-config router isis EXEC command in the CLI. If the device is configured for IS–IS routing, this command will return output. The following example shows the partial output of the show running-config router isis command on a device that is configured for IS–IS routing. #show running-config router isis router isis {isp} is-type level-2-only ... To determine if the device is configured for SNMP, administrators can use the show running-config snmp EXEC command in the CLI. If the device is configured for SNMP, this command will return output. The following examples show the partial output of the show running-config snmp command on a device that is configured for SNMP. Only one version of SNMP needs to be configured for the device to be vulnerable. The vulnerability is triggered through an SNMP query, but the configuration can be for read or write. SNMPv1 #show running-config snmp snmp-server community {public ro} ... SNMPv2 #show running-config snmp snmp-server group {SNMP_GROUP1} v2c ... SNMPv3 #show running-config snmp snmp-server view {SNMP_VIEW1 1.3.6.1.2.1.1.5 included} snmp-server group {SNMP_GROUP1} v3 {auth read SNMP_VIEW1} ... Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products 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: Cisco IOS and IOS XE Software Cisco IOS XR7-LNT Software Cisco NX-OS Software Workarounds There are no workarounds that address this vulnerability. However, administrators may choose to perform one of the following mitigations: Disable SNMP: This vulnerability is exploited by doing an SNMP query of a special MIB OID range. If SNMP is disabled, this vulnerability cannot be exploited. For mitigation of this vulnerability if SNMP is enabled on the device, contact Cisco TAC for assistance with the OIDs. Configure an access control list: Administrators can also configure an access control list (ACL) on an SNMP community to filter incoming SNMP requests to ensure that SNMP queries are performed only by trusted SNMP clients. For information about configuring ACLs, see the Cisco Guide to Harden Cisco IOS XR Devices. Fixed Software Cisco has released free software updates that address the vulnerability described in this advisory. 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 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. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, 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 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. Fixed Releases Cisco fixed this vulnerability in Cisco IOS XR Software Release 6.6.3. Cisco also plans to fix this vulnerability in Cisco IOS XR Software releases 7.0.2, 7.1.1, and 7.2.1. Customers are advised to install the appropriate SMU as shown in the following table. Customers who require SMUs for other platforms and releases are advised to contact their support organization. IOS XR Release Platform SMU Name 4.3.2 XR12000 c12k-4.3.2.CSCvr62342 5.2.5 NCS6K ncs6k-5.2.5.CSCvr62342 6.1.3 ASR9K-PX asr9k-px-6.1.3.CSCvr62342 6.1.3 NCS5K ncs5k-6.1.3.CSCvr62342 6.1.3 NCS5500 ncs5500-6.1.3.CSCvr62342 6.1.4 ASR9K-PX asr9k-px-6.1.4.CSCvr6234 6.1.4 CRS-PX hfr-px-6.1.4.CSCvr62342 6.1.4 NCS5500 ncs5500-6.1.4.CSCvr62342 6.1.4 NCS5K ncs5k-6.1.4.CSCvr62342 6.1.4 XRV9K xrv9k-6.1.4.CSCvr62342 6.2.25 NCS5K ncs5k-6.2.25.CSCvr62342 6.2.3 NCS5K ncs5k-6.2.3.CSCvr62342 6.2.3 ASR9K-PX asr9k-px-6.2.3.CSCvr62342 6.2.3 ASR9K-X64 asr9k-x64-6.2.3.CSCvr62342 6.2.3 CRS-PX hfr-px-6.2.3.CSCvr62342 6.2.3 NCS5500 ncs5500-6.2.3.CSCvr62342 6.2.3 XRV9K xrv9k-6.2.3.CSCvr62342 6.2.3 NCS6K ncs6k-6.2.3.CSCvr62342 6.3.15 NCS5500 ncs5500-6.3.15.CSCvr62342 6.3.2 ASR9K-PX asr9k-px-6.3.2.CSCvr62342 6.3.2 ASR9K-X64 asr9k-x64-6.3.2.CSCvr62342 6.3.3 ASR9K-X64 asr9k-x64-6.3.3.CSCvr62342 6.3.3 ASR9K-PX asr9k-px-6.3.3.CSCvr62342 6.3.3 NCS5K ncs5k-6.3.3.CSCvr62342 6.3.3 NCS540 ncs540-6.3.3.CSCvr62342 6.3.3 NCS5500 ncs5500-6.3.3.CSCvr62342 6.3.3 NCS6K 6.4.2 ASR9K-PX asr9k-px-6.4.2.CSCvr62342 6.4.2 ASR9K-X64 asr9k-x64-6.4.2.CSCvr62342 6.4.2 CRS-PX hfr-px-6.4.2.CSCvr62342 6.4.2 NCS5K ncs5k-6.4.2.CSCvr62342 6.4.2 NCS6K ncs6k-6.4.2.CSCvr62342 6.4.2 XRV9K xrv9k-6.4.2.CSCvr62342 6.5.2 ASR9K-PX asr9k-px-6.5.2.CSCvr62342 6.5.2 ASR9K-X64 asr9k-x64-6.5.2.CSCvr62342 6.5.2 NCS5K ncs5k-6.5.2.CSCvr62342 6.5.2 NCS5500 ncs5500-6.5.2.CSCvr62342 6.5.3 ASR9K-X64 asr9k-x64-6.5.3.CSCvr62342 6.5.3 NCS5500 ncs5500-6.5.3.CSCvr62342 6.5.3 NCS540 ncs540-6.5.3.CSCvr62342 6.5.3 NCS5K ncs5k-6.5.3.CSCvr62342 6.5.3 ASR9K-PX asr9k-px-6.5.3.CSCvr62342 6.5.3 NCS560 6.5.3 XRV9K xrv9k-6.5.3.CSCvr62342 6.6.1 NCS5500 ncs5500-6.6.1.CSCvr62342 6.6.2 ASR9K-PX asr9k-px-6.6.2.CSCvr62342 6.6.2 ASR9K-X64 asr9k-x64-6.6.2.CSCvr62342 6.6.25 NCS5500 ncs5500-6.6.25.CSCvr62342 6.6.25 NCS540 ncs540-6.6.25.CSCvr62342 6.6.25 NCS560 ncs560-6.6.25.CSCvr62342 To download the SMUs from the Software Center on Cisco.com, do the following: Click Browse All. Choose IOS and NX-OS Software > IOS XR > IOS XR Software > Optical Networking or Routers. Choose a specific product and model from the right pane of the product selector. Choose a release from the left pane of the product page. 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. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2020-January-22 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. _____________________________________________________________________ Cisco IOS XR Software EVPN Operational Routes Denial of Service Vulnerability High Advisory ID: cisco-sa-20200122-ios-xr-routes First Published: 2020 January 22 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvr74902 CVSS Score: Base 7.4 CVE-2019-16018 CWE-399 Summary A vulnerability in the implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer. 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes Affected Products Vulnerable Products The vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XR Software later than 6.6.1 and are configured for BGP on a device with the L2VPN EVPN address family. Determine Whether the Device Has a Vulnerable Configuration To determine whether the device is configured for BGP, administrators can use the show running-config router bgp EXEC command in the CLI. If the router is configured for BGP, this command will return output. The following example shows the partial output of the show running-config router bgp command on a device that is configured for BGP: # show running-config router bgp router bgp 65536 . . . To determine whether the device is configured for the EVPN address family, administrators can use the show running-config router bgp AS-Number address-family l2vpn evpn EXEC command in the CLI. If the router is configured for the BGP EVPN address family, this command will return output. The following example shows the partial output of the show running-config router bgp AS-Number address-family l2vpn evpn command on a device with the EVPN address family configured: # show running-config router bgp 65536 address-family l2vpn evpn router bgp 100 address-family l2vpn evpn . . . Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect Cisco IOS Software, Cisco IOS XE Software, or Cisco NX-OS Software. Details Ethernet VPN (EVPN) is a next-generation solution that provides Ethernet multipoint services over Multiprotocol Label Switching (MPLS) networks. Customers can learn more about EVPN and configuration options in L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers and in guides for other platforms that support this feature. Workarounds There are no workarounds that address this vulnerability. Fixed Software Cisco has released free software updates that address the vulnerability described in this advisory. 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 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. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, 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 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. Fixed Releases Cisco will fix this vulnerability in Cisco IOS XR Software Releases 6.63, 7.02, and 7.1.1. At the time of publication, the SMUs in the following table were available. Customers who require SMUs for other platforms and releases are advised to contact their support organization. IOS XR Release Platform SMU Name1 6.6.1 NCS5500 ncs5500-6.6.1.CSCvr91660 6.6.1 ASR9K-X64 asr9k-x64-6.6.1.CSCvr91660 6.6.1 NCS540 ncs540-6.6.1.CSCvr91660 6.6.1 NCS6K ncs6k-6.6.1.CSCvr91660 6.6.2 ASR9K asr9k-px-6.6.2.CSCvr91676 6.6.2 ASR9K-X64 asr9k-x64-6.6.2.CSCvr91676 6.6.2 CRS 6.6.2 NCS5K 6.6.2 XRV9K xrv9k-6.6.2.CSCvr91676 6.6.25 NCS540 6.6.25 NCS540L 6.6.25 NCS560 ncs560-6.6.25.CSCvr91676 6.6.25 NCS5500 ncs5500-6.6.25.CSCvr91676 7.0.1 ASR9K-X64 asr9k-x64-7.0.1.CSCvr91676 7.0.1 NCS1K 7.0.1 NCS5K 7.0.1 NCS6K 7.0.1 NCS540 7.0.1 NCS540L 7.0.1 NCS560 7.0.1 NCS5500 7.0.1 XRV9K 1. Fixes for the vulnerability described in this advisory were provided in the fix for CSCvr91660 and CSCvr91676. CSCvr91660 includes the fixes for CSCvr84254, CSCvr74986, CSCvr74413, CSCvr80793, CSCvr83742, CSCvr74902, CSCvo90073, and CSCvr69950. CSCvr91676 includes the fixes for CSCvr84254, CSCvr74986, CSCvr74413, CSCvr80793, CSCvr83742, CSCvr74902, and CSCvr69950. Customers can download the SMUs from the Software Center on Cisco.com by doing the following: Click Browse All. Choose IOS and NX-OS Software > IOS XR > IOS XR Software > Optical Networking or Routers. Choose the appropriate product and model. Access releases by using the left pane of the appropriate product page. 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 by Mrinmoy Ghosh of Cisco during internal security testing. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2020-January-22 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. _____________________________________________________________________ Cisco IOS XR Software EVPN Operational Routes Denial of Service Vulnerability High Advisory ID: cisco-sa-20200122-ios-xr-routes First Published: 2020 January 22 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvr74902 CVSS Score: Base 7.4 CVE-2019-16018 CWE-399 Summary A vulnerability in the implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer. 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes Affected Products Vulnerable Products The vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XR Software later than 6.6.1 and are configured for BGP on a device with the L2VPN EVPN address family. Determine Whether the Device Has a Vulnerable Configuration To determine whether the device is configured for BGP, administrators can use the show running-config router bgp EXEC command in the CLI. If the router is configured for BGP, this command will return output. The following example shows the partial output of the show running-config router bgp command on a device that is configured for BGP: # show running-config router bgp router bgp 65536 . . . To determine whether the device is configured for the EVPN address family, administrators can use the show running-config router bgp AS-Number address-family l2vpn evpn EXEC command in the CLI. If the router is configured for the BGP EVPN address family, this command will return output. The following example shows the partial output of the show running-config router bgp AS-Number address-family l2vpn evpn command on a device with the EVPN address family configured: # show running-config router bgp 65536 address-family l2vpn evpn router bgp 100 address-family l2vpn evpn . . . Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect Cisco IOS Software, Cisco IOS XE Software, or Cisco NX-OS Software. Details Ethernet VPN (EVPN) is a next-generation solution that provides Ethernet multipoint services over Multiprotocol Label Switching (MPLS) networks. Customers can learn more about EVPN and configuration options in L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers and in guides for other platforms that support this feature. Workarounds There are no workarounds that address this vulnerability. Fixed Software Cisco has released free software updates that address the vulnerability described in this advisory. 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 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. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, 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 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. Fixed Releases Cisco will fix this vulnerability in Cisco IOS XR Software Releases 6.63, 7.02, and 7.1.1. At the time of publication, the SMUs in the following table were available. Customers who require SMUs for other platforms and releases are advised to contact their support organization. IOS XR Release Platform SMU Name1 6.6.1 NCS5500 ncs5500-6.6.1.CSCvr91660 6.6.1 ASR9K-X64 asr9k-x64-6.6.1.CSCvr91660 6.6.1 NCS540 ncs540-6.6.1.CSCvr91660 6.6.1 NCS6K ncs6k-6.6.1.CSCvr91660 6.6.2 ASR9K asr9k-px-6.6.2.CSCvr91676 6.6.2 ASR9K-X64 asr9k-x64-6.6.2.CSCvr91676 6.6.2 CRS 6.6.2 NCS5K 6.6.2 XRV9K xrv9k-6.6.2.CSCvr91676 6.6.25 NCS540 6.6.25 NCS540L 6.6.25 NCS560 ncs560-6.6.25.CSCvr91676 6.6.25 NCS5500 ncs5500-6.6.25.CSCvr91676 7.0.1 ASR9K-X64 asr9k-x64-7.0.1.CSCvr91676 7.0.1 NCS1K 7.0.1 NCS5K 7.0.1 NCS6K 7.0.1 NCS540 7.0.1 NCS540L 7.0.1 NCS560 7.0.1 NCS5500 7.0.1 XRV9K 1. Fixes for the vulnerability described in this advisory were provided in the fix for CSCvr91660 and CSCvr91676. CSCvr91660 includes the fixes for CSCvr84254, CSCvr74986, CSCvr74413, CSCvr80793, CSCvr83742, CSCvr74902, CSCvo90073, and CSCvr69950. CSCvr91676 includes the fixes for CSCvr84254, CSCvr74986, CSCvr74413, CSCvr80793, CSCvr83742, CSCvr74902, and CSCvr69950. Customers can download the SMUs from the Software Center on Cisco.com by doing the following: Click Browse All. Choose IOS and NX-OS Software > IOS XR > IOS XR Software > Optical Networking or Routers. Choose the appropriate product and model. Access releases by using the left pane of the appropriate product page. 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 by Mrinmoy Ghosh of Cisco during internal security testing. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2020-January-22 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. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================