Bug 504555 (CVE-2009-1955)

Summary:	CVE-2009-1955 apr-util billion laughs attack
Product:	[Other] Security Response	Reporter:	Mark J. Cox <mjc>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bojan, bressers, jorton, kreilly
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-1955
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-20 17:10:29 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	504558, 504559, 504560, 504561, 504562, 505026, 505027, 591930, 595829
Bug Blocks:

Description Mark J. Cox 2009-06-08 08:15:07 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2009-1955 to the following vulnerability:

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.

Comment 3 Mark J. Cox 2009-06-08 08:37:32 UTC

*** Bug 503814 has been marked as a duplicate of this bug. ***

Comment 4 Tomas Hoger 2009-06-08 08:41:36 UTC

Public exploit posted to milw0rm:
  http://www.milw0rm.com/exploits/8842

Upstream patch:
  http://svn.apache.org/viewvc?view=rev&revision=781403
  http://marc.info/?l=apr-dev&m=124396021826125&w=2

Comment 5 Joe Orton 2009-06-08 09:21:44 UTC

Note that the patch committed is different from the one posted to the list.

Comment 6 errata-xmlrpc 2009-06-16 22:05:07 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 3

Via RHSA-2009:1108 https://rhn.redhat.com/errata/RHSA-2009-1108.html

Comment 7 errata-xmlrpc 2009-06-16 22:05:57 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 4

Via RHSA-2009:1107 https://rhn.redhat.com/errata/RHSA-2009-1107.html

Comment 8 Fedora Update System 2009-06-24 19:32:35 UTC

apr-util-1.2.12-7.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2009-06-24 19:36:26 UTC

apr-util-1.3.7-1.fc11 has been pushed to the Fedora 11 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2009-06-24 19:40:11 UTC

apr-util-1.3.7-1.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 errata-xmlrpc 2009-07-17 13:13:41 UTC

This issue has been addressed in following products:

  JBEWS 1.0.0 for RHEL 4

Via RHSA-2009:1160 https://rhn.redhat.com/errata/RHSA-2009-1160.html

Comment 14 errata-xmlrpc 2010-08-04 21:31:39 UTC

This issue has been addressed in following products:

  Red Hat Certificate System 7.3

Via RHSA-2010:0602 https://rhn.redhat.com/errata/RHSA-2010-0602.html