National Cyber Awareness System

Vulnerability Summary for CVE-2011-4858

Overview

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.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#903934

Name: VU#903934

Hyperlink:http://www.kb.cert.org/vuls/id/903934

External Source: MISC

Name: https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py

Hyperlink:https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py

External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=750521

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=750521

External Source: MISC

Name: http://www.ocert.org/advisories/ocert-2011-003.html

Hyperlink:http://www.ocert.org/advisories/ocert-2011-003.html

External Source: MISC

Name: http://www.nruns.com/_downloads/advisory28122011.pdf

Hyperlink:http://www.nruns.com/_downloads/advisory28122011.pdf

External Source: DEBIAN

Name: DSA-2401

Hyperlink:http://www.debian.org/security/2012/dsa-2401

External Source: CONFIRM

Name: http://tomcat.apache.org/tomcat-7.0-doc/changelog.html

Hyperlink:http://tomcat.apache.org/tomcat-7.0-doc/changelog.html

External Source: SECUNIA

Name: 48791

Hyperlink:http://secunia.com/advisories/48791

External Source: SECUNIA

Name: 48790

Hyperlink:http://secunia.com/advisories/48790

External Source: HP

Name: HPSBUX02741

Hyperlink:http://marc.info/?l=bugtraq&m=132871655717248&w=2

External Source: MLIST

Name: [announce] 20111228 [SECURITY] Apache Tomcat and the hashtable collision DoS vulnerability

Hyperlink:http://mail-archives.apache.org/mod_mbox/tomcat-announce/201112.mbox/%3c4EFB9800.5010106@apache.org%3e