Vulnerability Details

PHP Web Form Hash Collision Denial of Service Vulnerability (Windows)

Published: 2012-01-03 11:17:40
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact:
Successful exploitation could allow remote attackers to cause a denial of service via a specially crafted form sent in a HTTP POST request.

Affected Versions:
PHP Version 5.3.8 and prior.

Technical Details:
The flaws are due to an error in, - 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. - PDORow implementation, when interacting with the session feature. - timezone functionality, when handling php_date_parse_tzfile cache.

Recommendations:
Upgrade PHP to 5.3.9 or later.

Summary:
This host is installed with PHP and is prone to remote denial of service vulnerability.

Detection Type:
Remote Banner

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2011-4885
https://nvd.nist.gov/vuln/detail/CVE-2012-0788
https://nvd.nist.gov/vuln/detail/CVE-2012-0789

SecurityFocus Bugtraq ID:

https://www.securityfocus.com/bid/51193
https://www.securityfocus.com/bid/51952
https://www.securityfocus.com/bid/52043

References:

http://secunia.com/advisories/47404
http://www.kb.cert.org/vuls/id/903934
https://bugs.php.net/bug.php?id=53502
https://bugs.php.net/bug.php?id=55776
http://xforce.iss.net/xforce/xfdb/72021
http://www.exploit-db.com/exploits/18305/
http://www.exploit-db.com/exploits/18296/
http://www.ocert.org/advisories/ocert-2011-003.html
http://svn.php.net/viewvc?view=revision&revision=321040
http://php.net/downloads.php

Severity
Medium
CVSS Score
5.0
Published
2012-01-03
Modified
2018-10-12
Category
Denial of Service

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