CVE-2011-4362 Integer overflow in n/a

What is CVE-2011-4362?

CVE-2011-4362 is a medium-severity vulnerability in Debian Debian Linux, published on 24 Dec 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2011-4362?

It affects 2 products.

Products include Debian Debian Linux, Lighttpd Lighttpd.

How do I fix CVE-2011-4362?

Upgrade to a fixed version.

Is CVE-2011-4362 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-4362 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-4362, GHSA-wx9r-x448-8rcp.