CVE-2025-20115
Cisco IOS XR BGP Confederation Denial of Service Vulnerability
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.
INFO
Published Date :
March 12, 2025, 4:15 p.m.
Last Modified :
March 12, 2025, 4:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-20115.
| URL | Resource |
|---|---|
| https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ | |
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-20115 vulnerability anywhere in the article.
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Daily CyberSecurity
Critical Vulnerability (CVE-2025-31498) Patched in c-ares DNS Library
The Domain Name System (DNS) plays a pivotal role, translating human-friendly domain names into the numerical IP addresses that computers understand. And at the heart of many applications facilitating ... Read more
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Daily CyberSecurity
CISA Warns of Actively Exploited Linux Kernel Vulnerabilities (CVE-2024-53197, CVE-2024-53150)
The Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning after adding two newly discovered Linux kernel vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, co ... Read more
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Daily CyberSecurity
Seven Years Later: Cisco CVE-2018-0171 Still Exposes Thousands to RCE
In a deep dive published by Guy Bruneau, Senior Security Consultant and former network engineer, the lingering dangers of a years-old Cisco vulnerability—CVE-2018-0171—are laid bare with fresh insight ... Read more
The following table lists the changes that have been made to the
CVE-2025-20115 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Mar. 12, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Added CWE CWE-120 Added Reference https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-20115 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-20115
weaknesses.