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TITLE:
Perl FCGI Module CGI::Fast API Environment Variables Security Bypass

SECUNIA ADVISORY ID:
SA46263

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46263/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46263

RELEASE DATE:
2011-10-29

DISCUSS ADVISORY:
http://secunia.com/advisories/46263/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/46263/

ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=46263

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A security issue has been reported in the FCGI module for Perl, which
can be exploited by malicious people to bypass certain security
restrictions.

The security issue is caused due to the CGI::Fast API not properly
resetting environment variables, which can be exploited to leak
information (e.g. authentication credentials) from the second request
into subsequent requests, if the first request had an empty
environment.

Note: Successful exploitation requires that the deprecated CGI::Fast
API is used.

The security issue is reported in versions 0.7x prior to 0.74.

SOLUTION:
Update to version 0.74.

PROVIDED AND/OR DISCOVERED BY:
Reported in a bug by ssinyagin.

ORIGINAL ADVISORY:
http://cpansearch.perl.org/src/FLORA/FCGI-0.74/ChangeLog
https://rt.cpan.org/Public/Bug/Display.html?id=68380
http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=catagits/fcgi2.git;a=commitdiff;h=297693dc8362d25bb25e473899c72508a0f71d2e

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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