CVE-2007-3946 Denial of service in n/a

Medium 6.4 Published 24 Jul 2007 Updated 7 Aug 2024

Remote attackers can crash the lighttpd web server daemon via malformed Auth-Digest headers, causing a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2007-3946?

CVE-2007-3946 is a medium-severity denial of service vulnerability in n/a, published on 24 Jul 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

mod_auth (http_auth.c) in lighttpd before 1.4.16 allows remote attackers to cause a denial of service (daemon crash) via unspecified vectors involving (1) a memory leak, (2) use of md5-sess without a cnonce, (3) base64 encoded strings, and (4) trailing whitespace in the Auth-Digest header.

Which versions are affected by CVE-2007-3946?

It affects 1 product.

Products include Lighttpd Lighttpd.

How do I fix CVE-2007-3946?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2007-3946 being exploited?

There is no known exploitation of CVE-2007-3946 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2007-3946, GHSA-2xvj-x73g-2j9w.