---
id: CVE-2013-4322
title: >-
  Apache Tomcat before 6.0.39, 7.x before 7.0.50, and 8.x before 8.0.0-RC10
  processes chunked transfer coding without properly handling (1) a large total
  amount of chunked data or (2) whitespace characters in an HTTP header value
  within a …
summary: >-
  Apache Tomcat before 6.0.39, 7.x before 7.0.50, and 8.x before 8.0.0-RC10
  processes chunked transfer coding without properly handling (1) a large total
  amount of chunked data or (2) whitespace characters in an HTTP header value
  within a …
severity: medium
cvss: 4.3
cvssVector: 'AV:N/AC:M/Au:N/C:N/I:N/A:P'
cwe:
  - CWE-20
vendor: apache
product: tomcat
affected:
  - tomcat = 7.0.0
  - tomcat = 7.0.1
  - tomcat = 7.0.2
  - tomcat = 7.0.3
  - tomcat = 7.0.4
  - 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 = 7.0.24
  - tomcat = 7.0.25
  - tomcat = 7.0.26
  - tomcat = 7.0.27
  - tomcat = 7.0.28
  - tomcat = 7.0.29
  - tomcat = 7.0.30
  - tomcat = 7.0.31
  - tomcat = 7.0.32
  - tomcat = 7.0.33
  - tomcat = 7.0.34
  - tomcat = 7.0.35
  - tomcat = 7.0.36
  - tomcat = 7.0.37
  - tomcat = 7.0.38
  - tomcat = 7.0.39
  - tomcat = 7.0.40
  - tomcat = 7.0.41
  - tomcat = 7.0.42
  - tomcat = 7.0.43
  - tomcat = 7.0.44
  - tomcat = 7.0.45
  - tomcat = 7.0.46
  - tomcat = 7.0.50
  - tomcat <= 6.0.37
  - tomcat = 1.1.3
  - tomcat = 3.0
  - tomcat = 3.1
  - tomcat = 3.1.1
  - tomcat = 3.2
  - tomcat = 3.2.1
  - tomcat = 3.2.2
  - tomcat = 3.2.3
  - tomcat = 3.2.4
  - tomcat = 3.3
  - tomcat = 3.3.1
  - tomcat = 3.3.1a
  - tomcat = 3.3.2
  - tomcat = 4
  - tomcat = 4.0.0
  - tomcat = 4.0.1
  - tomcat = 4.0.2
  - tomcat = 4.0.3
  - tomcat = 4.0.4
  - tomcat = 4.0.5
  - tomcat = 4.0.6
  - tomcat = 4.1.0
  - tomcat = 4.1.1
  - tomcat = 4.1.2
  - tomcat = 4.1.3
  - tomcat = 4.1.9
  - tomcat = 4.1.10
  - tomcat = 4.1.12
  - tomcat = 4.1.15
  - tomcat = 4.1.24
  - tomcat = 4.1.28
  - tomcat = 4.1.29
  - tomcat = 4.1.31
  - tomcat = 4.1.36
  - tomcat = 5
  - tomcat = 5.0.0
  - tomcat = 5.0.1
  - tomcat = 5.0.2
  - tomcat = 5.0.3
  - tomcat = 5.0.4
  - tomcat = 5.0.5
  - tomcat = 5.0.6
  - tomcat = 5.0.7
  - tomcat = 5.0.8
  - tomcat = 5.0.9
  - tomcat = 5.0.10
  - tomcat = 5.0.11
  - tomcat = 5.0.12
  - tomcat = 5.0.13
  - tomcat = 5.0.14
  - tomcat = 5.0.15
  - tomcat = 5.0.16
  - tomcat = 5.0.17
  - tomcat = 5.0.18
  - tomcat = 5.0.19
  - tomcat = 5.0.21
published: '2014-02-26'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:17:07.663'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2013-4322'
references:
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    label: secalert@redhat.com
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      https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
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      https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
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      https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
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      https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
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    label: af854a3a-2127-422b-91ae-364da2661108
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  - url: 'http://tomcat.apache.org/security-7.html'
    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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      http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.ubuntu.com/usn/USN-2130-1'
    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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    label: af854a3a-2127-422b-91ae-364da2661108
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      https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04851013
    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
  - url: 'https://rhn.redhat.com/errata/RHSA-2014-0686.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - exploit-available
epss: 0.09458
epssPercentile: 0.95318
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/LiviuPtr/CVE-2013-4322_PoC'
  checkedAt: '2026-10-09T21:13:16.222Z'
exploitAvailable: true
ingestedAt: '2026-10-09T21:12:42.313Z'
---

## Overview

Apache Tomcat before 6.0.39, 7.x before 7.0.50, and 8.x before 8.0.0-RC10 processes chunked transfer coding without properly handling (1) a large total amount of chunked data or (2) whitespace characters in an HTTP header value within a trailer field, which allows remote attackers to cause a denial of service by streaming data.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-3544.

## Affected

- `tomcat = 7.0.0`
- `tomcat = 7.0.1`
- `tomcat = 7.0.2`
- `tomcat = 7.0.3`
- `tomcat = 7.0.4`
- `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 = 7.0.24`
- `tomcat = 7.0.25`
- `tomcat = 7.0.26`
- `tomcat = 7.0.27`
- `tomcat = 7.0.28`
- `tomcat = 7.0.29`
- `tomcat = 7.0.30`
- `tomcat = 7.0.31`
- `tomcat = 7.0.32`
- `tomcat = 7.0.33`
- `tomcat = 7.0.34`
- `tomcat = 7.0.35`
- `tomcat = 7.0.36`
- `tomcat = 7.0.37`
- `tomcat = 7.0.38`
- `tomcat = 7.0.39`
- `tomcat = 7.0.40`
- `tomcat = 7.0.41`
- `tomcat = 7.0.42`
- `tomcat = 7.0.43`
- `tomcat = 7.0.44`
- `tomcat = 7.0.45`
- `tomcat = 7.0.46`
- `tomcat = 7.0.50`
- `tomcat <= 6.0.37`
- `tomcat = 1.1.3`
- `tomcat = 3.0`
- `tomcat = 3.1`
- `tomcat = 3.1.1`
- `tomcat = 3.2`
- `tomcat = 3.2.1`
- `tomcat = 3.2.2`
- `tomcat = 3.2.3`
- `tomcat = 3.2.4`
- `tomcat = 3.3`
- `tomcat = 3.3.1`
- `tomcat = 3.3.1a`
- `tomcat = 3.3.2`
- `tomcat = 4`
- `tomcat = 4.0.0`
- `tomcat = 4.0.1`
- `tomcat = 4.0.2`
- `tomcat = 4.0.3`
- `tomcat = 4.0.4`
- `tomcat = 4.0.5`
- `tomcat = 4.0.6`
- `tomcat = 4.1.0`
- `tomcat = 4.1.1`
- `tomcat = 4.1.2`
- `tomcat = 4.1.3`
- `tomcat = 4.1.9`
- `tomcat = 4.1.10`
- `tomcat = 4.1.12`
- `tomcat = 4.1.15`
- `tomcat = 4.1.24`
- `tomcat = 4.1.28`
- `tomcat = 4.1.29`
- `tomcat = 4.1.31`
- `tomcat = 4.1.36`
- `tomcat = 5`
- `tomcat = 5.0.0`
- `tomcat = 5.0.1`
- `tomcat = 5.0.2`
- `tomcat = 5.0.3`
- `tomcat = 5.0.4`
- `tomcat = 5.0.5`
- `tomcat = 5.0.6`
- `tomcat = 5.0.7`
- `tomcat = 5.0.8`
- `tomcat = 5.0.9`
- `tomcat = 5.0.10`
- `tomcat = 5.0.11`
- `tomcat = 5.0.12`
- `tomcat = 5.0.13`
- `tomcat = 5.0.14`
- `tomcat = 5.0.15`
- `tomcat = 5.0.16`
- `tomcat = 5.0.17`
- `tomcat = 5.0.18`
- `tomcat = 5.0.19`
- `tomcat = 5.0.21`

## Remediation

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