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CVE-2009-1955

Published: 8 June 2009

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.

Notes

AuthorNote
mdeslaur
PoC: http://www.milw0rm.com/exploits/8842

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
dapper
Released (2.0.55-4ubuntu2.5)
hardy Not vulnerable
(uses system apr-util)
intrepid Not vulnerable
(uses system apr-util)
jaunty Not vulnerable
(uses system apr-util)
upstream Needs triage

apr-util
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy
Released (1.2.12+dfsg-3ubuntu0.1)
intrepid
Released (1.2.12+dfsg-7ubuntu0.1)
jaunty
Released (1.2.12+dfsg-8ubuntu0.1)
upstream
Released (1.3.7+dfsg-1)
Patches:
upstream: http://svn.apache.org/viewvc?view=rev&revision=781415

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H