From: Secunia Security Advisories (sec-advsecunia.com)
Date: Thu Apr 04 2013 - 19:36:40 CDT

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TITLE:
HAProxy HTTP Request Processing Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA52725

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/52725/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=52725

RELEASE DATE:
2013-04-04

DISCUSS ADVISORY:
http://secunia.com/advisories/52725/#comments

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

http://secunia.com/advisories/52725/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=52725

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 vulnerability has been reported in HAProxy, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the HTTP content
inspection mechanism when processing HTTP requests and can be
exploited to crash the service via specially crafted request.

Successful exploitation requires HTTP keep-alive to be enabled, HTTP
inspection in TCP rules to be used, and usage of request appending
rules (e.g. reqadd or x-forwarded-for).

The vulnerability is reported in versions prior to 1.4.23.

SOLUTION:
Update to version 1.4.23.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Yves Lafon, W3C.

ORIGINAL ADVISORY:
OSS:
http://openwall.com/lists/oss-security/2013/04/03/1

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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