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Hardcore Disassembler / Reverse Engineer Wanted!

Want to work with IDA and BinDiff?
Want to write PoC's and Exploits?

Your nationality is not important.
We will get you a work permit, find an apartment, and offer a
relocation compensation package.

http://secunia.com/hardcore_disassembler_and_reverse_engineer/

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TITLE:
Apache "mod_alias" URL Validation Canonicalization Vulnerability

SECUNIA ADVISORY ID:
SA21490

VERIFY ADVISORY:
http://secunia.com/advisories/21490/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Apache 2.2.x
http://secunia.com/product/9633/
Apache 2.0.x
http://secunia.com/product/73/

DESCRIPTION:
Susam Pal has discovered a vulnerability in Apache, which can be
exploited by malicious people to bypass certain security restrictions
and disclose potentially sensitive information.

The vulnerability is caused due to an canonicalization error in the
"mod_alias" module in the handling of case-sensitive alias directive
arguments on file systems supporting case-insensitive directory
names. This can e.g. be exploited to disclose the source code of
applications placed in the "cgi-bin" directory on certain non-default
configurations where the ScriptAlias directive references a directory
inside the document root by accessing an URL with a capital directory
name (e.g. "CGI-BIN").

Example of a vulnerable configuration:
DocumentRoot "[path]/docroot/"
ScriptAlias /cgi-bin/ "/[path]/docroot/cgi-bin"

NOTE: This only affects the Microsoft Windows platform.

The vulnerability has been confirmed in versions 2.0.59 and 2.2.3,
and has also been reported in version 2.2.2. Other versions may also
be affected.

SOLUTION:
Edit the configuration to ensure that alias directives (e.g.
ScriptAlias) references directories outside of the document root.

PROVIDED AND/OR DISCOVERED BY:
Susam Pal, Infosys Technologies Ltd.

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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:
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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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