CVE-2011-4858

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 73.86% Top 5%
Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory marc.info Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory marc.info Vendor Advisory marc.info Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
http://www.debian.org/security/2012/dsa-2401 vendor advisory
http://www.nruns.com/_downloads/advisory28122011.pdf
http://rhn.redhat.com/errata/RHSA-2012-0325.html vendor advisory
http://marc.info/?l=bugtraq&m=136485229118404&w=2 vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0078.html vendor advisory
http://www.securityfocus.com/bid/51200 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=750521
http://secunia.com/advisories/48791 third party advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18886 vdb entry signature
http://tomcat.apache.org/tomcat-7.0-doc/changelog.html
http://rhn.redhat.com/errata/RHSA-2012-0075.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0074.html vendor advisory
http://secunia.com/advisories/48549 third party advisory
http://rhn.redhat.com/errata/RHSA-2012-0089.html vendor advisory
http://secunia.com/advisories/54971 third party advisory
http://secunia.com/advisories/48790 third party advisory
http://secunia.com/advisories/55115 third party advisory
http://www.kb.cert.org/vuls/id/903934 third party advisory us government resource
http://mail-archives.apache.org/mod_mbox/tomcat-announce/201112.mbox/%3c4EFB9800.5010106%40apache.org%3e mailing list
http://marc.info/?l=bugtraq&m=133294394108746&w=2 vendor advisory
http://marc.info/?l=bugtraq&m=132871655717248&w=2 vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0406.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0076.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0077.html vendor advisory
http://www.ocert.org/advisories/ocert-2011-003.html

Frequently Asked Questions

What is the severity of CVE-2011-4858?
CVE-2011-4858 has been scored as a medium severity vulnerability.
How to fix CVE-2011-4858?
To fix CVE-2011-4858, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4858 being actively exploited in the wild?
It is possible that CVE-2011-4858 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~74% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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