Detections
Analytics
Cisco IOS XR Software Border Gateway Protocol Confederation DoS (cisco-sa-iosxr-bgp-dos-O7stePhX)
high Nessus Plugin ID 232841
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS XR is affected by a vulnerability.- 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. (CVE-2025-20115)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwk15887See Also
http://www.nessus.org/u?142863cd
Plugin Details
Severity: High
ID: 232841
File Name: cisco-sa-iosxr-bgp-dos-O7stePhX-iosxr.nasl
Version: 1.1
Type: combined
Family: CISCO
Published: 3/18/2025
Updated: 3/18/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2025-20115
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xr
Required KB Items: Host/Cisco/IOS-XR/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 3/12/2025
Vulnerability Publication Date: 3/12/2025
Reference Information
CVE: CVE-2025-20115