CVE-2011-4885

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 83.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-12-30 · updated 2026-06-16
Weakness: CWE-20

Description

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.

Affected products

PHP: through 5.3.8; 5.0.0, 5.0.0-beta1, 5.0.0-beta2, 5.0.0-beta3, 5.0.0-beta4, 5.0.0-rc1 (+38)

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html
http://marc.info/?l=bugtraq&m=132871655717248&w=2
http://marc.info/?l=bugtraq&m=133469208622507&w=2
http://rhn.redhat.com/errata/RHSA-2012-0071.html
http://secunia.com/advisories/47404
http://secunia.com/advisories/48668
http://support.apple.com/kb/HT5281
http://svn.php.net/viewvc?view=revision&revision=321003

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