Input validation error in Cisco Systems, Inc products - CVE-2023-20049
Published: March 9, 2023
Vulnerability identifier: #VU73203
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: CVE-2023-20049
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XR
Cisco ASR 9000 Series Aggregation Services Routers
ASR 9902 Compact High-Performance Routers
ASR 9903 Compact High-Performance Routers
Cisco IOS XR
Cisco ASR 9000 Series Aggregation Services Routers
ASR 9902 Compact High-Performance Routers
ASR 9903 Compact High-Performance Routers
Detailed vulnerability description
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.
How to mitigate CVE-2023-20049
Install updates from vendor's website.