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CVE-2012-4534

18
FAUCET Score

CVE-2012-4534 describes a denial-of-service vulnerability affecting Apache Tomcat versions 6.x before 6.0.36 and 7.x before 7.0.28, specifically when using the NIO connector with sendfile and HTTPS. An attacker can trigger an infinite loop by prematurely terminating a connection during response reading. This vulnerability has a CVSS score of 2.6, indicating low severity, with a potential impact of partial availability compromise and high attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

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

2.6LOW

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.45%
Probability of exploitation in next 30 days
EPSS Percentile
93.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0745 is in the 94th percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: tomcat6-0:6.0.24-52.el6_4
View patch
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-2012-4534Moderate

Tomcat - Denial Of Service when using NIO+SSL+sendfile

Dec 4, 2012

References

archives.neohapsis.com / archives/bugtraq/2012-12/0043.html
lists.opensuse.org / opensuse-updates/2013-01/msg00051.html
lists.opensuse.org / opensuse-updates/2013-01/msg00061.html
lists.opensuse.org / opensuse-updates/2013-01/msg00080.html
marc.info
marc.info
rhn.redhat.com / errata/RHSA-2013-0623.html
secunia.com / advisories/57126
h20566.www2.hp.com / portal/site/hpsc/public/kb/docDisplay
issues.apache.org / bugzilla/show_bug.cgi
Exploit
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19398
svn.apache.org / viewvc/tomcat/tc7.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java
Patch
svn.apache.org / viewvc/tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml
Patch
svn.apache.org / viewvc
tomcat.apache.org / security-6.html
Vendor Advisory
tomcat.apache.org / security-7.html
Vendor Advisory
securityfocus.com / bid/56813
securitytracker.com / id
ubuntu.com / usn/USN-1685-1