Resource management error in Cisco IOS XR - CVE-2022-20758
Published: April 15, 2022
Vulnerability identifier: #VU62350
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-20758
CWE-ID: CWE-399
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 improper management of internal resources within the application in the implementation of the Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality. A remote attacker can send a BGP update message that contains specific EVPN attributes and perform a denial of service (DoS) attack.
Affected software
Cisco IOS XR
How to mitigate CVE-2022-20758
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 7.3.2, 7.4.2