CVE-2011-4858

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 79.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-01-05 · updated 2026-06-16
Weakness: CWE-399

Description

Apache Tomcat before 5.5.35, 6.x before 6.0.35, and 7.x before 7.0.23 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

Apache Tomcat: 5.5.35, 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4 (+53)

References

http://mail-archives.apache.org/mod_mbox/tomcat-announce/201112.mbox/%3c4EFB9800.5010106%40apache.org%3e
http://marc.info/?l=bugtraq&m=132871655717248&w=2
http://marc.info/?l=bugtraq&m=133294394108746&w=2
http://marc.info/?l=bugtraq&m=136485229118404&w=2
http://rhn.redhat.com/errata/RHSA-2012-0074.html
http://rhn.redhat.com/errata/RHSA-2012-0075.html
http://rhn.redhat.com/errata/RHSA-2012-0076.html
http://rhn.redhat.com/errata/RHSA-2012-0077.html
http://rhn.redhat.com/errata/RHSA-2012-0078.html
http://rhn.redhat.com/errata/RHSA-2012-0089.html
http://rhn.redhat.com/errata/RHSA-2012-0325.html
http://rhn.redhat.com/errata/RHSA-2012-0406.html

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