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Last updated: Sat May 25 12:20:46 EDT 2013

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-1955

Original release date:06/08/2009
Last revised:04/18/2013
Source: US-CERT/NIST

Overview

The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:7.8 (HIGH) (AV:N/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

References to Advisories, Solutions, and Tools

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External Source: DEBIAN
Name: DSA-1812
Type: Patch Information
Hyperlink:http://www.debian.org/security/2009/dsa-1812
External Source: CONFIRM
Name: http://www.apache.org/dist/apr/CHANGES-APR-UTIL-1.3
Type: Patch Information
Hyperlink:http://www.apache.org/dist/apr/CHANGES-APR-UTIL-1.3
External Source: MLIST
Name: [apr-dev] 20090602 [PATCH] prevent "billion laughs" attack against expat
Type: Patch Information
Hyperlink:http://marc.info/?l=apr-dev&m=124396021826125&w=2
External Source: FEDORA
Name: FEDORA-2009-5969
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01228.html
External Source: FEDORA
Name: FEDORA-2009-6261
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01201.html
External Source: FEDORA
Name: FEDORA-2009-6014
Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01173.html
External Source: VUPEN
Name: ADV-2010-1107
Hyperlink:http://www.vupen.com/english/advisories/2010/1107
External Source: VUPEN
Name: ADV-2009-3184
Type: Advisory
Hyperlink:http://www.vupen.com/english/advisories/2009/3184
External Source: VUPEN
Name: ADV-2009-1907
Hyperlink:http://www.vupen.com/english/advisories/2009/1907
External Source: UBUNTU
Name: USN-787-1
Hyperlink:http://www.ubuntu.com/usn/usn-787-1
External Source: UBUNTU
Name: USN-786-1
Hyperlink:http://www.ubuntu.com/usn/usn-786-1
External Source: BID
Name: 35253
Hyperlink:http://www.securityfocus.com/bid/35253
External Source: BUGTRAQ
Name: 20090824 rPSA-2009-0123-1 apr-util
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/506053/100/0/threaded
External Source: REDHAT
Name: RHSA-2009:1108
Hyperlink:http://www.redhat.com/support/errata/RHSA-2009-1108.html
External Source: REDHAT
Name: RHSA-2009:1107
Hyperlink:http://www.redhat.com/support/errata/RHSA-2009-1107.html
External Source: CONFIRM
Name: http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
Hyperlink:http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
External Source: MLIST
Name: [oss-security] 20090603 CVE request: "billion laughs" attack against Apache APR
Hyperlink:http://www.openwall.com/lists/oss-security/2009/06/03/4
External Source: MILW0RM
Name: 8842
Hyperlink:http://www.milw0rm.com/exploits/8842
External Source: MANDRIVA
Name: MDVSA-2009:131
Hyperlink:http://www.mandriva.com/security/advisories?name=MDVSA-2009:131
External Source: CONFIRM
Name: http://www-01.ibm.com/support/docview.wss?uid=swg27014463
Hyperlink:http://www-01.ibm.com/support/docview.wss?uid=swg27014463
External Source: AIXAPAR
Name: PK99478
Hyperlink:http://www-01.ibm.com/support/docview.wss?uid=swg1PK99478
External Source: AIXAPAR
Name: PK91241
Hyperlink:http://www-01.ibm.com/support/docview.wss?uid=swg1PK91241
External Source: AIXAPAR
Name: PK88342
Hyperlink:http://www-01.ibm.com/support/docview.wss?uid=swg1PK88342
External Source: CONFIRM
Name: http://wiki.rpath.com/Advisories:rPSA-2009-0123
Hyperlink:http://wiki.rpath.com/Advisories:rPSA-2009-0123
External Source: CONFIRM
Name: http://svn.apache.org/viewvc?view=rev&revision=781403
Hyperlink:http://svn.apache.org/viewvc?view=rev&revision=781403
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3937
Hyperlink:http://support.apple.com/kb/HT3937
External Source: SLACKWARE
Name: SSA:2009-167-02
Hyperlink:http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.538210
External Source: GENTOO
Name: GLSA-200907-03
Hyperlink:http://security.gentoo.org/glsa/glsa-200907-03.xml
External Source: SECUNIA
Name: 37221
Type: Advisory
Hyperlink:http://secunia.com/advisories/37221
External Source: SECUNIA
Name: 36473
Type: Advisory
Hyperlink:http://secunia.com/advisories/36473
External Source: SECUNIA
Name: 35843
Hyperlink:http://secunia.com/advisories/35843
External Source: SECUNIA
Name: 35797
Hyperlink:http://secunia.com/advisories/35797
External Source: SECUNIA
Name: 35710
Type: Advisory
Hyperlink:http://secunia.com/advisories/35710
External Source: SECUNIA
Name: 35565
Type: Advisory
Hyperlink:http://secunia.com/advisories/35565
External Source: SECUNIA
Name: 35487
Type: Advisory
Hyperlink:http://secunia.com/advisories/35487
External Source: SECUNIA
Name: 35444
Type: Advisory
Hyperlink:http://secunia.com/advisories/35444
External Source: SECUNIA
Name: 35395
Type: Advisory
Hyperlink:http://secunia.com/advisories/35395
External Source: SECUNIA
Name: 35360
Type: Advisory
Hyperlink:http://secunia.com/advisories/35360
External Source: SECUNIA
Name: 35284
Type: Advisory
Hyperlink:http://secunia.com/advisories/35284
External Source: SECUNIA
Name: 34724
Type: Advisory
Hyperlink:http://secunia.com/advisories/34724
External Source: OVAL
Name: oval:org.mitre.oval:def:12473
Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:12473
External Source: OVAL
Name: oval:org.mitre.oval:def:10270
Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:10270
External Source: HP
Name: SSRT100345
Hyperlink:http://marc.info/?l=bugtraq&m=129190899612998&w=2
External Source: HP
Name: SSRT100345
Hyperlink:http://marc.info/?l=bugtraq&m=129190899612998&w=2
External Source: SUSE
Name: SUSE-SR:2010:011
Hyperlink:http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
External Source: APPLE
Name: APPLE-SA-2009-11-09-1
Hyperlink:http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html

References to Check Content

Identifier:oval:org.mitre.oval:def:12473
Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:12473
Identifier:oval:org.mitre.oval:def:10270
Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:10270

Vulnerable software and versions

Nav control imageConfiguration 1
spacerNav control imageOR
spacerspacerNav control image* cpe:/a:apache:apr-util:0.9.5
spacerspacerNav control image* cpe:/a:apache:apr-util:0.9.4
spacerspacerNav control image* cpe:/a:apache:apr-util:1.0.1
spacerspacerNav control image* cpe:/a:apache:apr-util:1.0
spacerspacerNav control image* cpe:/a:apache:apr-util:0.9.1
spacerspacerNav control image* cpe:/a:apache:apr-util:0.9.3
spacerspacerNav control image* cpe:/a:apache:apr-util:0.9.2
spacerspacerNav control image* cpe:/a:apache:apr-util:1.1.0
spacerspacerNav control image* cpe:/a:apache:apr-util:1.0.2
spacerspacerNav control image* cpe:/a:apache:apr-util:1.1.1
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.1
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.2
spacerspacerNav control image* cpe:/a:apache:apr-util:1.2.8
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.0
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.3
spacerspacerNav control image* cpe:/a:apache:apr-util:1.2.2
spacerspacerNav control image* cpe:/a:apache:apr-util:1.2.1
spacerspacerNav control image* cpe:/a:apache:apr-util:1.2.7
spacerspacerNav control image* cpe:/a:apache:apr-util:1.2.6
spacerspacerNav control image* cpe:/a:apache:apr-util:1.1.2
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.4
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.5
spacerspacerNav control image* cpe:/a:apache:apr-util:1.3.6 and previous versions
spacerspacerNav control image* cpe:/a:apache:http_server
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
  • Resource Management Errors (CWE-399)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1955