CVE-2025-20115

Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

Published Mar 12, 2025 CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed
Description
A vulnerability in confederation implementation for the Border Gateway Protocol (BGP)&nbsp;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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-7287 A vulnerability in confederation implementation for the Border Gateway Protocol (BGP)&nbsp;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.
History
Type Values Removed Values Added
First Time appeared Cisco ios Xr
CPEs cpe:2.3:o:cisco:ios_xr:24.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:24.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:24.2.11:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:24.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:24.2.20:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:24.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.1:*:*:*:*:*:*:*
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:6.5.2:*:*:*:*:*:*:*
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:6.5.3:*:*:*:*:*:*:*
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:6.6.11:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:*
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:6.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.35:*:*:*:*:*:*:*
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:6.8.1:*:*:*:*:*:*:*
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:7.0.11:*:*:*:*:*:*:*
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:7.0.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.25:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.10.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.10.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.11.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.11.21:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.11.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.16:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.27:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.3.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.4.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.4.16:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.52:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.5.5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.6.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.6.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.7.21:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.7.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.8.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.8.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.8.22:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.8.23:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.8.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.9.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.9.21:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.9.2:*:*:*:*:*:*:*
Vendors & Products Cisco ios Xr
Type Values Removed Values Added
Metrics epss

{'score': 0.00163}

epss

{'score': 0.00181}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A vulnerability in confederation implementation for the Border Gateway Protocol (BGP)&nbsp;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.
Title Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Mar 21, 2025, 8:35 PM
Reserved
Oct 10, 2024, 7:15 PM
Status
Analyzed
Published
Mar 12, 2025, 4:15 PM
Modified
Jun 17, 2026, 8:40 AM