Input validation error in Cisco Systems, Inc products - CVE-2023-20049

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Main Vulnerability Database Vulnerabilities #VU73203

Input validation error in Cisco Systems, Inc products - CVE-2023-20049

Published: March 9, 2023


Vulnerability identifier: #VU73203
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-20049
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the incorrect handling of malformed BFD packets that are received on line cards where the bidirectional forwarding detection (BFD) hardware offload feature is enabled. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


Affected software

Cisco ASR 9000 Series Aggregation Services Routers
ASR 9902 Compact High-Performance Routers
ASR 9903 Compact High-Performance Routers
Cisco IOS XR

How to mitigate CVE-2023-20049

Install updates from vendor's website.

Cisco IOS XR - addressed in versions 7.5.3, 7.6.2, 7.7.1

External References

Related Security Bulletins