A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the attacker to cause a queue wedge on the interface, 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-quewedge-69BsHUBW [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-quewedge-69BsHUBW”]
This advisory is part of the September 2021 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 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. [“https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581”]
Vendor | Product | Version | CPE |
---|---|---|---|
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:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.10 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.10:*:*:*:*:*:*:* |
cisco | cisco_ios_xe_software | 16.11 | cpe:2.3:a:cisco:cisco_ios_xe_software:16.11:*:*:*:*:*:*:* |