Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2012-2733

23
FAUCET Score

CVE-2012-2733 describes a denial-of-service vulnerability in Apache Tomcat versions 6.x before 6.0.36 and 7.x before 7.0.28, specifically within the HTTP NIO connector's InternalNioInputBuffer. Attackers can exploit this by sending an excessively large amount of header data, leading to significant memory consumption and system unavailability. The vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in a partial availability impact. There is no evidence of active exploitation, nor are there publicly available exploit tools like Metasploit or Nuclei modules, and it has received no significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:6.0:*:*:*:*:*:*:*
6.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:6.0.0:*:*:*:*:*:*:*
6.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:6.0.0:alpha:*:*:*:*:*:*
6.0.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:6.0.1:*:*:*:*:*:*:*
6.0.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:6.0.1:alpha:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.74%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0874 is in the 93rd percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 5Fixed in: tomcat6-0:6.0.35-6_patch_06.ep6.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: tomcat6-0:6.0.35-29_patch_06.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 2.0
View patch

Vendor Advisories (1)

redhatCVE-2012-2733Moderate

tomcat: HTTP NIO connector OOM DoS via a request with large headers

Nov 5, 2012

References

lists.opensuse.org / opensuse-updates/2012-12/msg00089.html
lists.opensuse.org / opensuse-updates/2012-12/msg00090.html
lists.opensuse.org / opensuse-updates/2013-01/msg00037.html
marc.info
marc.info
secunia.com / advisories/51371
secunia.com / advisories/57126
h20566.www2.hp.com / portal/site/hpsc/public/kb/docDisplay
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19218
svn.apache.org / viewvc
svn.apache.org / viewvc
tomcat.apache.org / security-6.html
Vendor Advisory
tomcat.apache.org / security-7.html
Vendor Advisory
securityfocus.com / bid/56402
securitytracker.com / id
ubuntu.com / usn/USN-1637-1