Main Vulnerability Database Vulnerabilities #VU81270

Out-of-bounds write in Cisco IOS and Cisco IOS XE - CVE-2023-20109

Published: September 29, 2023

Vulnerability identifier: #VU81270

CSH Severity: High

CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-20109

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to insufficient validation of attributes in the Group Domain of Interpretation (GDOI) and G-IKEv2 protocols within the Cisco Group Encrypted Transport VPN (GET VPN) feature. A remote authenticated user with administrative control of either a group member or a key server can trigger an out-of-bounds write and execute arbitrary code on the target system.

Note, the vulnerability has been exploited in the wild.

Affected software

Cisco IOS
Cisco IOS XE

How to mitigate CVE-2023-20109

Install updates from vendor's website.

Cisco IOS - addressed in versions 16.12.10, 17.3.7, 17.9.1y, 17.9.3, 17.9.4, 17.11.1, 17.12.1
Cisco IOS XE - addressed in versions 16.12.10, 17.3.7, 17.9.1y, 17.9.3, 17.9.4, 17.11.1, 17.12.1

External References

Related Security Bulletins