CVE-2007-3947 Denial of service in n/a

Medium 5.8 Published 24 Jul 2007 Updated 7 Aug 2024

Remote attackers can crash the lighttpd web server by sending HTTP requests with duplicate 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-2007-3947?

CVE-2007-3947 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

request.c in lighttpd 1.4.15 allows remote attackers to cause a denial of service (daemon crash) by sending an HTTP request with duplicate headers, as demonstrated by a request containing two Location header lines, which results in a segmentation fault.

Which versions are affected by CVE-2007-3947?

It affects 1 product.

Products include Lighttpd Lighttpd.

How do I fix CVE-2007-3947?

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-2007-3947 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-3947 exists.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as CVE-2007-2841, DEBIAN-CVE-2007-3947, GHSA-x97h-9f4h-rj28.