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high7.5Public exploit code

CVE-2009-1955

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 …

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Impact

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.

Affected products

VendorProductAffected versions
ApacheApr-Util
before 1.3.7
AppleMac Os X
before 10.6.2
SuseLinux Enterprise Server
Version 9
DebianDebian Linux
Version 4.0
CanonicalUbuntu Linux
Versions 6.06, 8.04, 8.10, 9.04
FedoraprojectFedora
Versions 9, 10, 11
OracleHttp Server
All versions
ApacheHttp Server
from 2.2.0 before 2.2.12

Weakness classification

CWE-776

References