CVE-2023-26463

CRITICAL

strongSwan 5.9.8-5.9.9 - Remote Code Execution via EAP-TLS Client Certificate Handling

Title source: llm
STIX 2.1

Description

strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes within the same function. There is initially incorrect access control, later followed by an expired pointer dereference. One attack vector is sending an untrusted client certificate during EAP-TLS. A server is affected only if it loads plugins that implement TLS-based EAP methods (EAP-TLS, EAP-TTLS, EAP-PEAP, or EAP-TNC). This is fixed in 5.9.10.

Scores

CVSS v3 9.8
EPSS 0.0226
EPSS Percentile 80.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-295 CWE-476
Status published
Products (2)
strongswan/strongswan 5.9.8
strongswan/strongswan 5.9.9
Published Apr 15, 2023
Tracked Since Feb 18, 2026