CVE-2012-5821: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 0.8% chance of exploitation in the next 30 days.

Lynx does not verify that the server's certificate is signed by a trusted certification authority, which allows man-in-the-middle attackers to spoof SSL servers via a crafted certificate, related to improper use of a certain GnuTLS function.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.10 only; version 12.04 only; version 12.10 only
• Lynx Lynx: affected versions not specified

Published 2012-11-04. Last modified 2026-06-16.