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CVE-2009-1955

Publication date 8 June 2009

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
apache2 9.04 jaunty
Not affected
8.10 intrepid
Not affected
8.04 LTS hardy
Not affected
6.06 LTS dapper
Fixed 2.0.55-4ubuntu2.5
apr-util 9.04 jaunty
Fixed 1.2.12+dfsg-8ubuntu0.1
8.10 intrepid
Fixed 1.2.12+dfsg-7ubuntu0.1
8.04 LTS hardy
Fixed 1.2.12+dfsg-3ubuntu0.1
6.06 LTS dapper Not in release

Notes


mdeslaur

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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apr-util

Severity score breakdown

Parameter Value
Base score 7.5 · High
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

References

Related Ubuntu Security Notices (USN)

    • USN-786-1
    • apr-util vulnerabilities
    • 10 June 2009
    • USN-787-1
    • Apache vulnerabilities
    • 11 June 2009

Other references