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TITLE:
OWASP Stinger Multipart Encoded Request Security Bypass

SECUNIA ADVISORY ID:
SA26441

VERIFY ADVISORY:
http://secunia.com/advisories/26441/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
OWASP Stinger 2.x
http://secunia.com/product/15278/

DESCRIPTION:
Meder Kydyraliev has reported a weakness in OWASP Stinger, which can
be exploited by malicious people to bypass certain security
restrictions.

The weakness is caused due to the improper handling of multipart
encoded requests, e.g. by the "getParameterNames()" and
"getParameter()" functions. This can be exploited to bypass input
validation checks performed e.g. by the "checkMalformedParameters()"
function when multipart encoded requests are used.

The vulnerability is reported in versions prior to 2.5.

SOLUTION:
Update to version 2.5.
http://www.owasp.org/index.php/OWASP_Stinger_Version_2

PROVIDED AND/OR DISCOVERED BY:
Meder Kydyraliev.

ORIGINAL ADVISORY:
http://o0o.nu/~meder/o0o_bypassing_servlet_input_validation_filters.txt

OWASP:
http://www.owasp.org/index.php/Category:OWASP_Stinger_Project#Stinger_News

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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