Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability (Cisco Cisco IOS XR Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.90 % · percentile 60 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Analyzed
Description
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.
Weaknesses (CWE)
- CWE-120 — Buffer Copy without Checking Size of Input
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | cisco |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2025-7287
- GCVE · GCVE-0-2025-20115
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:ios_xr:6.5.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.15:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.25:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.26:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.28:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.29:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.31:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.32:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.33:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.35:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.90:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.92:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.93:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.11:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.12:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.35:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.8.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.8.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.9.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.9.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.14:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*- +53 more
Affected products
| 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 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |