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Vulnerability Details : CVE-2011-2766

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.
Publish Date : 2011-09-23 Last Update Date : 2017-08-28
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 287

- Related OVAL Definitions

Title Definition Id Class Family
CVE-2011-2766 unix
DSA-2327-1 libfcgi-perl -- authentication bypass oval:org.mitre.oval:def:15090 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-2766

# Product Type Vendor Product Version Update Edition Language
1 Application Perl Perl Version Details Vulnerabilities
2 Application Sven Verdoolaege Fcgi 0.70 Version Details Vulnerabilities
3 Application Sven Verdoolaege Fcgi 0.71 02 Version Details Vulnerabilities
4 Application Sven Verdoolaege Fcgi 0.71 03 Version Details Vulnerabilities
5 Application Sven Verdoolaege Fcgi 0.71 Version Details Vulnerabilities
6 Application Sven Verdoolaege Fcgi 0.71 01 Version Details Vulnerabilities
7 Application Sven Verdoolaege Fcgi 0.72 Version Details Vulnerabilities
8 Application Sven Verdoolaege Fcgi 0.73 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Perl Perl 1
Sven Verdoolaege Fcgi 7

- References For CVE-2011-2766
BID 49549 Perl Fast CGI Module CGI Variables Authentication Security Bypass Vulnerability Release Date:2012-08-28
SUSE openSUSE-SU-2012:0004
SUSE openSUSE-SU-2012:0036
XF perlfast-cgi-security-bypass(69709)
MLIST [oss-security] 20110908 CVE Request -- libfcgi-perl / perl-FCGI: Certain environment variables shared between first and subsequent HTTP requests
MLIST [oss-security] 20110908 Re: CVE Request -- libfcgi-perl / perl-FCGI: Certain environment variables shared between first and subsequent HTTP requests CONFIRM CONFIRM

- Metasploit Modules Related To CVE-2011-2766

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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