#VU81270 Out-of-bounds write in Cisco IOS and Cisco IOS XE - CVE-2023-20109
Published: September 29, 2023
Vulnerability identifier: #VU81270
Vulnerability risk: High
CVSSv4.0: 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/E:A/U:Amber
CVE-ID: CVE-2023-20109
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Cisco IOS
Cisco IOS XE
Cisco IOS
Cisco IOS XE
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
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.
Remediation
Install updates from vendor's website.