Vulnerability in Apache Tomcat
CVE-2011-4858
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.797 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.797 · newest: 0.797 · change: 0.000
Affected products
- Apache Tomcat — versions 5.5.35, 6.0.0, 6.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
- www.debian.org/security/2012/dsa-2401 (vendor-advisory)
- www.nruns.com/_downloads/advisory28122011.pdf
- rhn.redhat.com/errata/RHSA-2012-0325.html (vendor-advisory)
- marc.info/ (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2012-0078.html (vendor-advisory)
- www.securityfocus.com/bid/51200 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi
- secunia.com/advisories/48791 (third-party-advisory)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:18886 (signature, vdb-entry)
Frequently asked questions
- What is CVE-2011-4858?
- CVE-2011-4858 is a vulnerability in Apache Tomcat, classified under CWE-399. Published 2012-01-05.
- Is CVE-2011-4858 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.