CVE-2011-2766 Auth bypass in n/a
Remote attackers can bypass authentication in Perl FCGI modules by exploiting environment variable leakage between requests via crafted HTTP headers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-2766?
CVE-2011-2766 is a high-severity authentication bypass vulnerability in Debian Debian Linux, published on 23 Sep 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers.
Weakness: CWE-287
Which versions are affected by CVE-2011-2766?
It affects 2 products.
Linux distribution packages (1)
FastCGI openSUSE:Tumbleweed | All versions | 2.4.0-171.10 |
Products include Debian Debian Linux, Fast Cgi Project Fast Cgi.
How do I fix CVE-2011-2766?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2011-2766 being exploited?
There is no known exploitation of CVE-2011-2766 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2011-2766, DSA-2327-1, GHSA-57h3-ccpr-f6f8, openSUSE-SU-2024:10387-1.