NULL pointer dereference in Strongswan
CVE-2023-26463
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.
Vulnerability class: Improper Certificate Validation
EPSS: 0.023 (81.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Strongswan — versions 5.9.8, 5.9.9
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Mitigation, Vendor Advisory)
- cve@mitre.org
Frequently asked questions
- What is CVE-2023-26463?
- CVE-2023-26463 is a critical-severity vulnerability in Strongswan, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2023-04-15.
- How severe is CVE-2023-26463?
- Critical severity. CVSS v3 base score is 9.8 out of 10.