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TITLE:
Ada Web Server Web Form Hash Collision Denial of Service
Vulnerability

SECUNIA ADVISORY ID:
SA47803

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47803/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47803

RELEASE DATE:
2012-01-30

DISCUSS ADVISORY:
http://secunia.com/advisories/47803/#comments

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

http://secunia.com/advisories/47803/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=47803

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Ogro has reported a vulnerability in Ada Web Server, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within a hash generation
function when hashing form posts and updating a hash table. This can
be exploited to cause a hash collision resulting in high CPU
consumption via a specially crafted form sent in a HTTP POST
request.

The vulnerability is reported in version 2.10.0. Other versions may
also be affected.

SOLUTION:
Update to version 2.10.2 or 2.11.

PROVIDED AND/OR DISCOVERED BY:
Ogro

ORIGINAL ADVISORY:
Ada Web Server:
http://archives.neohapsis.com/archives/bugtraq/2012-01/0169.html

Ogro:
http://ogrod2.blogspot.com/2012/01/28c3-effective-denial-of-service.html

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
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