CVE-2011-4362: Debian Linux

Medium severity, CVSS 5.0. EPSS: 21.1% chance of exploitation in the next 30 days.

Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index.

Affected products

• Debian Debian Linux: version 5.0 only; version 6.0 only; version 7.0 only
• Lighttpd Lighttpd: from 1.4.1, before 1.4.30 (fixed in 1.4.30); version 1.5.0 only

Published 2011-12-24. Last modified 2026-06-16.