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TITLE:
Apache HTTP Server mod_proxy Reverse Proxy Mode Security Bypass
Weakness

SECUNIA ADVISORY ID:
SA46987

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46987/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46987

RELEASE DATE:
2011-11-24

DISCUSS ADVISORY:
http://secunia.com/advisories/46987/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/46987/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=46987

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Prutha Parikh has reported a weakness in Apache HTTP Server, which
can be exploited by malicious people to bypass certain security
restrictions.

The weakness is caused due to the mod_proxy module, when configured
in reverse proxy mode, incorrectly processing certain web requests.
This can be exploited to send requests to an unintended server behind
the proxy via a specially crafted URL.

This is caused due to an incomplete fix for:
SA46288

The weakness is reported in all 2.x versions.

SOLUTION:
Edit reverse proxy rules.

PROVIDED AND/OR DISCOVERED BY:
Prutha Parikh, Qualys.

ORIGINAL ADVISORY:
Apache:
http://thread.gmane.org/gmane.comp.apache.devel/46440

Qualys:
https://community.qualys.com/blogs/securitylabs/tags/cve-2011-4317

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

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Please Note:
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