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Last updated: 2/11/2016 4:00:56 AM

CVE Publication rate: 12.57

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Vulnerability Workload Index: 4.93
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National Cyber Awareness System

Vulnerability Summary for CVE-2009-1891

Original release date: 07/10/2009
Last revised: 09/06/2011


The mod_deflate module in Apache httpd 2.2.11 and earlier compresses large files until completion even after the associated network connection is closed, which allows remote attackers to cause a denial of service (CPU consumption).


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.1 HIGH
Impact Subscore: 6.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: OVAL
Name: oval:org.mitre.oval:def:12361
External Source: VUPEN
Name: ADV-2009-3184
Type: Advisory
External Source: BUGTRAQ
Name: 20091113 rPSA-2009-0142-2 httpd mod_ssl
External Source: REDHAT
Name: RHSA-2009:1156
External Source: OVAL
Name: oval:org.mitre.oval:def:8632
External Source: HP
Name: SSRT100345
External Source: CONFIRM
Name: http://wiki.rpath.com/Advisories:rPSA-2009-0142
External Source: MISC
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=534712
External Source: AIXAPAR
Name: PK91361
External Source: UBUNTU
Name: USN-802-1
External Source: VUPEN
Name: ADV-2009-1841
Type: Advisory
External Source: SUSE
Name: SUSE-SA:2009:050
External Source: DEBIAN
Name: DSA-1834
External Source: APPLE
Name: APPLE-SA-2009-11-09-1
External Source: GENTOO
Name: GLSA-200907-04
External Source: AIXAPAR
Name: PK99480
External Source: MLIST
Name: [apache-httpd-dev] 20090628 mod_deflate DoS
External Source: MANDRIVA
Name: MDVSA-2009:149
Type: Patch Information
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3937
External Source: OVAL
Name: oval:org.mitre.oval:def:9248
External Source: SECTRACK
Name: 1022529
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=509125
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2009-8812
External Source: REDHAT
Name: RHSA-2009:1148
Type: Patch Information
External Source: CONFIRM
Name: http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0142
External Source: OSVDB
Name: 55782
External Source: HP
Name: HPSBOV02683
External Source: MLIST
Name: [apache-httpd-dev] 20090703 Re: mod_deflate DoS

References to Check Content

Identifier: oval:org.mitre.oval:def:12361
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:8632
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:9248
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:apache:http_server:2.2.1
* cpe:/a:apache:http_server:2.2.0
* cpe:/a:apache:http_server:2.2
* cpe:/a:apache:http_server:2.1.9
* cpe:/a:apache:http_server:2.1.8
* cpe:/a:apache:http_server:2.1.7
* cpe:/a:apache:http_server:2.1.6
* cpe:/a:apache:http_server:2.2.10
* cpe:/a:apache:http_server:2.2.2
* cpe:/a:apache:http_server:2.2.3
* cpe:/a:apache:http_server:2.2.4
* cpe:/a:apache:http_server:2.2.5
* cpe:/a:apache:http_server:2.2.6
* cpe:/a:apache:http_server:2.2.7
* cpe:/a:apache:http_server:2.2.8
* cpe:/a:apache:http_server:2.2.9
* cpe:/a:apache:http_server:2.1.5
* cpe:/a:apache:http_server:2.1.4
* cpe:/a:apache:http_server:2.1.3
* cpe:/a:apache:http_server:2.1.2
* cpe:/a:apache:http_server:2.1.1
* cpe:/a:apache:http_server:2.1
* cpe:/a:apache:http_server:2.0.9
* cpe:/a:apache:http_server:2.0.61
* cpe:/a:apache:http_server:2.0.60
* cpe:/a:apache:http_server:2.0.59
* cpe:/a:apache:http_server:2.0.58
* cpe:/a:apache:http_server:2.0.57
* cpe:/a:apache:http_server:2.0.56
* cpe:/a:apache:http_server:2.0.55
* cpe:/a:apache:http_server:2.0.54
* cpe:/a:apache:http_server:2.0.53
* cpe:/a:apache:http_server:2.0.52
* cpe:/a:apache:http_server:2.0.51
* cpe:/a:apache:http_server:2.0.50
* cpe:/a:apache:http_server:2.0.49
* cpe:/a:apache:http_server:2.0.48
* cpe:/a:apache:http_server:2.0.47
* cpe:/a:apache:http_server:0.8.11
* cpe:/a:apache:http_server:0.8.14
* cpe:/a:apache:http_server:1.0.2
* cpe:/a:apache:http_server:1.0.3
* cpe:/a:apache:http_server:1.0.5
* cpe:/a:apache:http_server:1.1
* cpe:/a:apache:http_server:1.1.1
* cpe:/a:apache:http_server:1.2
* cpe:/a:apache:http_server:1.2.4
* cpe:/a:apache:http_server:1.2.9
* cpe:/a:apache:http_server:1.3.13
* cpe:/a:apache:http_server:1.3.14
* cpe:/a:apache:http_server:1.3.18
* cpe:/a:apache:http_server:1.3.19
* cpe:/a:apache:http_server:1.3.20
* cpe:/a:apache:http_server:1.3.22
* cpe:/a:apache:http_server:1.3.23
* cpe:/a:apache:http_server:1.3.27
* cpe:/a:apache:http_server:1.3.29
* cpe:/a:apache:http_server:1.3.3
* cpe:/a:apache:http_server:1.3.31
* cpe:/a:apache:http_server:1.3.33
* cpe:/a:apache:http_server:1.3.38
* cpe:/a:apache:http_server:1.3.6
* cpe:/a:apache:http_server:1.3.7
* cpe:/a:apache:http_server:1.3.9
* cpe:/a:apache:http_server:1.99
* cpe:/a:apache:http_server:2.0.28
* cpe:/a:apache:http_server:2.0.34:beta
* cpe:/a:apache:http_server:2.0.38
* cpe:/a:apache:http_server:2.0.39
* cpe:/a:apache:http_server:2.0.40
* cpe:/a:apache:http_server:2.0.41
* cpe:/a:apache:http_server:2.0.42
* cpe:/a:apache:http_server:2.0.45
* cpe:/a:apache:http_server:2.0.46
* cpe:/a:apache:http_server:2.2.11 and previous versions

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
  • Resource Management Errors (CWE-399)