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CVE-2011-0534

23
FAUCET Score

CVE-2011-0534 describes a denial-of-service vulnerability in Apache Tomcat versions 7.0.0 through 7.0.6 and 6.0.0 through 6.0.30, specifically affecting the NIO HTTP connector. An unauthenticated remote attacker can exploit this by sending a crafted request that bypasses the maxHttpHeaderSize limit, leading to an OutOfMemoryError. This vulnerability has a CVSS score of 5.0 (medium severity) with low attack complexity and potential for partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:7.0.0:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:7.0.1:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:7.0.2:*:*:*:*:*:*:*
7.0.3CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:7.0.3:*:*:*:*:*:*:*
7.0.4CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:7.0.4:*:*:*:*:*:*:*

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
7.89%
Probability of exploitation in next 30 days
EPSS Percentile
94.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0789 is in the 92nd percentile among its peer group of 23,701 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 (6)

mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 6.0.32
mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcatFixed in: 7.0.8
redhatpatch availablevia redhat_api
Product: JBEWS 1.0 for RHEL 4Fixed in: tomcat6-0:6.0.24-11.patch_03.ep5.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: tomcat6-0:6.0.24-24.el6_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1 for RHEL 5Fixed in: tomcat6-0:6.0.24-11.patch_03.ep5.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 1.0
View patch

Vendor Advisories (2)

mavenGHSA-43v2-6grp-9pp9high

Apache Tomcat does not enforce the maxHttpHeaderSize limit

May 14, 2022
redhatCVE-2011-0534Moderate

tomcat: remote DoS via NIO connector

Jan 21, 2011

References

lists.apple.com / archives/Security-announce/2011//Oct/msg00003.html
lists.opensuse.org / opensuse-security-announce/2011-04/msg00000.html
marc.info
osvdb.org / 70809
secunia.com / advisories/43192
secunia.com / advisories/45022
secunia.com / advisories/57126
securityreason.com / securityalert/8074
exchange.xforce.ibmcloud.com / vulnerabilities/65162
support.apple.com / kb/HT5002
support.novell.com / docs/Readmes/InfoDocument/patchbuilder/readme_5098550.html
tomcat.apache.org / security-6.html
PatchVendor Advisory
tomcat.apache.org / security-7.html
debian.org / security/2011/dsa-2160
securityfocus.com / archive/1/516214/100/0/threaded
securityfocus.com / bid/46164
securitytracker.com / id
vupen.com / english/advisories/2011/0293
Vendor Advisory