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TITLE:
Jenkins Winstone Web Form Hash Collision Denial of Service
Vulnerability

SECUNIA ADVISORY ID:
SA47519

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47519/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47519

RELEASE DATE:
2012-01-17

DISCUSS ADVISORY:
http://secunia.com/advisories/47519/#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/47519/

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=47519

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 Jenkins, 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 in the Winstone servlet container 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 versions 1.446 and prior and
versions 1.424.1 and prior.

SOLUTION:
Update to version 1.447 or 1.424.2 (please see the vendor's advisory
for more information).

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cloudbees.com/jenkins-advisory/jenkins-security-advisory-2012-01-10.cb

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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Definitions: (Criticality, Where etc.)
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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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