A vulnerability in the implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this vulnerability by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device. A successful exploit could allow the attacker to reload the device, resulting in a DoS condition.
Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-6vpe-dos-tJBtf5Zv [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-6vpe-dos-tJBtf5Zv”]
This advisory is part of the September 2022 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 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. [“https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74745”]
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | cisco_ios_xe_software | 3.16s | cpe:2.3:a:cisco:cisco_ios_xe_software:3.16s:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 3.17s | cpe:2.3:a:cisco:cisco_ios_xe_software:3.17s:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.2 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.2:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.3 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.3:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.4 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.4:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.5 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.5:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.6 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.6:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.7 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.7:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.8 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.8:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.9 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.9:*:*:*:*:*:*:* |