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Last updated: 5/31/2016 1:38:30 AM

CVE Publication rate: 19.23

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Vulnerability Workload Index: 12.14
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National Cyber Awareness System

Vulnerability Summary for CVE-2011-4885

Original release date: 12/29/2011
Last revised: 10/10/2013


PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 MEDIUM
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: SUSE
Name: openSUSE-SU-2012:0426
External Source: MISC
Name: https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
External Source: CONFIRM
Name: http://svn.php.net/viewvc?view=revision&revision=321003
External Source: APPLE
Name: APPLE-SA-2012-05-09-1
External Source: MISC
Name: http://www.ocert.org/advisories/ocert-2011-003.html
External Source: HP
Name: HPSBUX02741
External Source: BUGTRAQ
Name: 20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table
External Source: HP
Name: HPSBMU02786
External Source: EXPLOIT-DB
Name: 18296
External Source: EXPLOIT-DB
Name: 18305
External Source: SECTRACK
Name: 1026473
External Source: CONFIRM
Name: http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html
External Source: CONFIRM
Name: http://support.apple.com/kb/HT5281
External Source: REDHAT
Name: RHSA-2012:0019
US-CERT Vulnerability Note: CERT-VN
Name: VU#903934
External Source: XF
Name: php-hash-dos(72021)
External Source: MANDRIVA
Name: MDVSA-2011:197
External Source: DEBIAN
Name: DSA-2399
External Source: CONFIRM
Name: http://svn.php.net/viewvc?view=revision&revision=321040
External Source: MANDRIVA
Name: MDVSA-2013:150
External Source: REDHAT
Name: RHSA-2012:0071
External Source: BID
Name: 51193
External Source: MISC
Name: http://www.nruns.com/_downloads/advisory28122011.pdf

Technical Details

Vulnerability Type (View All)