CVE-2009-1955

Advisory lineage Upstream: 0 Downstream: 7
Modified
Published: 06 Jun 2009, 18:00
Last modified:07 Aug 2024, 05:36

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
2.33% LOW
2% probability -0.24%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

06 Jun 2009, 18:00
Published
Vulnerability first disclosed
07 Aug 2024, 05:36
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 2.33%• Percentile: 85%

Techniques & Countermeasures

  • CWE-776•Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

    The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

Affected Systems

  • apache•apr-util

    < 1.3.7

  • Unknown•HTTP Server

    ≥ 2.2.0, < 2.2.12

  • apple•mac_os_x

    < 10.6.2

  • canonical•ubuntu_linux

    6.06 | 8.04 | 8.10 | 9.04

  • debian•debian_linux

    4.0

  • fedoraproject•fedora

    9 | 10 | 11

  • oracle•http_server

    na

  • suse•linux_enterprise_server

    9

References (60)