Description (CNA)
A vulnerability in confederation implementation for the Border Gateway Protocol (BGP) in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Cisco / Cisco IOS XR Software | affected 6.5.3; affected 6.5.29; affected 6.5.1; affected 6.6.1; affected 6.5.2; affected 6.5.92; affected 6.5.15; affected 6.6.2; affected 7.0.1; affected 6.6.25; affected 6.5.26; affected 6.6.11; affected 6.5.25; affected 6.5.28; affected 6.5.93; affected 6.6.12; affected 6.5.90; affected 7.0.0; affected 7.1.1; affected 7.0.90; affected 6.6.3; affected 6.7.1; affected 7.0.2; affected 7.1.15; affected 7.2.0; affected 7.2.1; affected 7.1.2; affected 6.7.2; affected 7.0.11; affected 7.0.12; affected 7.0.14; affected 7.1.25; affected 6.6.4; affected 7.2.12; affected 7.3.1; affected 7.1.3; affected 6.7.3; affected 7.4.1; affected 7.2.2; affected 6.7.4; affected 6.5.31; affected 7.3.15; affected 7.3.16; affected 6.8.1; affected 7.4.15; affected 6.5.32; affected 7.3.2; affected 7.5.1; affected 7.4.16; affected 7.3.27; affected 7.6.1; affected 7.5.2; affected 7.8.1; affected 7.6.15; affected 7.5.12; affected 7.8.12; affected 7.3.3; affected 7.7.1; affected 6.8.2; affected 7.3.4; affected 7.4.2; affected 6.7.35; affected 6.9.1; affected 7.6.2; affected 7.5.3; affected 7.7.2; affected 6.9.2; affected 7.9.1; affected 7.10.1; affected 7.8.2; affected 7.5.4; affected 6.5.33; affected 7.8.22; affected 7.7.21; affected 7.9.2; affected 7.3.5; affected 7.5.5; affected 7.11.1; affected 7.9.21; affected 7.10.2; affected 24.1.1; affected 7.6.3; affected 7.3.6; affected 7.5.52; affected 7.11.2; affected 24.2.1; affected 24.1.2; affected 24.2.11; affected 24.2.2; affected 7.8.23; affected 7.11.21; affected 24.2.20; affected 6.5.35 |
CWE
CWE-120
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX
- https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/
ADP enrichment
No English description supplied.
No references supplied.