---
id: CVE-2012-3544
title: >-
  Apache Tomcat 6.x before 6.0.37 and 7.x before 7.0.30 does not properly handle
  chunk extensions in chunked transfer coding, which allows remote attackers to
  cause a denial of service by streaming data.
summary: >-
  Apache Tomcat 6.x before 6.0.37 and 7.x before 7.0.30 does not properly handle
  chunk extensions in chunked transfer coding, which allows remote attackers to
  cause a denial of service by streaming data.
severity: medium
cvss: 5
cvssVector: 'AV:N/AC:L/Au:N/C:N/I:N/A:P'
cwe:
  - CWE-20
vendor: apache
product: tomcat
affected:
  - tomcat = 6.0
  - tomcat = 6.0.0
  - tomcat = 6.0.1
  - tomcat = 6.0.2
  - tomcat = 6.0.3
  - tomcat = 6.0.4
  - tomcat = 6.0.5
  - tomcat = 6.0.6
  - tomcat = 6.0.7
  - tomcat = 6.0.8
  - tomcat = 6.0.9
  - tomcat = 6.0.10
  - tomcat = 6.0.11
  - tomcat = 6.0.12
  - tomcat = 6.0.13
  - tomcat = 6.0.14
  - tomcat = 6.0.15
  - tomcat = 6.0.16
  - tomcat = 6.0.17
  - tomcat = 6.0.18
  - tomcat = 6.0.19
  - tomcat = 6.0.20
  - tomcat = 6.0.24
  - tomcat = 6.0.26
  - tomcat = 6.0.27
  - tomcat = 6.0.28
  - tomcat = 6.0.29
  - tomcat = 6.0.30
  - tomcat = 6.0.31
  - tomcat = 6.0.32
  - tomcat = 6.0.33
  - tomcat = 6.0.35
  - tomcat = 6.0.36
  - tomcat = 7.0.0
  - tomcat = 7.0.1
  - tomcat = 7.0.2
  - tomcat = 7.0.3
  - tomcat = 7.0.4
  - tomcat = 7.0.5
  - tomcat = 7.0.6
  - tomcat = 7.0.7
  - tomcat = 7.0.8
  - tomcat = 7.0.9
  - tomcat = 7.0.10
  - tomcat = 7.0.11
  - tomcat = 7.0.12
  - tomcat = 7.0.13
  - tomcat = 7.0.14
  - tomcat = 7.0.15
  - tomcat = 7.0.16
  - tomcat = 7.0.17
  - tomcat = 7.0.18
  - tomcat = 7.0.19
  - tomcat = 7.0.20
  - tomcat = 7.0.21
  - tomcat = 7.0.22
  - tomcat = 7.0.23
  - tomcat = 7.0.25
  - tomcat = 7.0.28
published: '2013-06-01'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:17:03.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2012-3544'
references:
  - url: 'http://archives.neohapsis.com/archives/bugtraq/2013-05/0042.html'
    label: secalert@redhat.com
  - url: 'http://seclists.org/fulldisclosure/2014/Dec/23'
    label: secalert@redhat.com
  - url: >-
      http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java?r1=1476592&r2=1476591&pathrev=1476592
    label: secalert@redhat.com
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1378702'
    label: secalert@redhat.com
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1378921'
    label: secalert@redhat.com
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1476592'
    label: secalert@redhat.com
  - url: 'http://tomcat.apache.org/security-6.html'
    label: secalert@redhat.com
  - url: 'http://tomcat.apache.org/security-7.html'
    label: secalert@redhat.com
  - url: 'http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html'
    label: secalert@redhat.com
  - url: 'http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html'
    label: secalert@redhat.com
  - url: 'http://www.securityfocus.com/archive/1/534161/100/0/threaded'
    label: secalert@redhat.com
  - url: 'http://www.securityfocus.com/bid/59797'
    label: secalert@redhat.com
  - url: 'http://www.securityfocus.com/bid/64758'
    label: secalert@redhat.com
  - url: 'http://www.ubuntu.com/usn/USN-1841-1'
    label: secalert@redhat.com
  - url: 'http://www.vmware.com/security/advisories/VMSA-2014-0012.html'
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: >-
      https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
    label: secalert@redhat.com
  - url: 'http://archives.neohapsis.com/archives/bugtraq/2013-05/0042.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2014/Dec/23'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/coyote/http11/filters/ChunkedInputFilter.java?r1=1476592&r2=1476591&pathrev=1476592
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1378702'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1378921'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://svn.apache.org/viewvc?view=revision&revision=1476592'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://tomcat.apache.org/security-6.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://tomcat.apache.org/security-7.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/archive/1/534161/100/0/threaded'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/59797'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/64758'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.ubuntu.com/usn/USN-1841-1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.vmware.com/security/advisories/VMSA-2014-0012.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.11001
epssPercentile: 0.95805
ingestedAt: '2026-10-09T21:12:42.312Z'
---

## Overview

Apache Tomcat 6.x before 6.0.37 and 7.x before 7.0.30 does not properly handle chunk extensions in chunked transfer coding, which allows remote attackers to cause a denial of service by streaming data.

## Affected

- `tomcat = 6.0`
- `tomcat = 6.0.0`
- `tomcat = 6.0.1`
- `tomcat = 6.0.2`
- `tomcat = 6.0.3`
- `tomcat = 6.0.4`
- `tomcat = 6.0.5`
- `tomcat = 6.0.6`
- `tomcat = 6.0.7`
- `tomcat = 6.0.8`
- `tomcat = 6.0.9`
- `tomcat = 6.0.10`
- `tomcat = 6.0.11`
- `tomcat = 6.0.12`
- `tomcat = 6.0.13`
- `tomcat = 6.0.14`
- `tomcat = 6.0.15`
- `tomcat = 6.0.16`
- `tomcat = 6.0.17`
- `tomcat = 6.0.18`
- `tomcat = 6.0.19`
- `tomcat = 6.0.20`
- `tomcat = 6.0.24`
- `tomcat = 6.0.26`
- `tomcat = 6.0.27`
- `tomcat = 6.0.28`
- `tomcat = 6.0.29`
- `tomcat = 6.0.30`
- `tomcat = 6.0.31`
- `tomcat = 6.0.32`
- `tomcat = 6.0.33`
- `tomcat = 6.0.35`
- `tomcat = 6.0.36`
- `tomcat = 7.0.0`
- `tomcat = 7.0.1`
- `tomcat = 7.0.2`
- `tomcat = 7.0.3`
- `tomcat = 7.0.4`
- `tomcat = 7.0.5`
- `tomcat = 7.0.6`
- `tomcat = 7.0.7`
- `tomcat = 7.0.8`
- `tomcat = 7.0.9`
- `tomcat = 7.0.10`
- `tomcat = 7.0.11`
- `tomcat = 7.0.12`
- `tomcat = 7.0.13`
- `tomcat = 7.0.14`
- `tomcat = 7.0.15`
- `tomcat = 7.0.16`
- `tomcat = 7.0.17`
- `tomcat = 7.0.18`
- `tomcat = 7.0.19`
- `tomcat = 7.0.20`
- `tomcat = 7.0.21`
- `tomcat = 7.0.22`
- `tomcat = 7.0.23`
- `tomcat = 7.0.25`
- `tomcat = 7.0.28`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.