Denial of Service (DoS) Affecting apr package, versions [,1.3.7)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
52.99% (99th percentile)

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  • Snyk IDSNYK-UNMANAGED-APR-2384859
  • published12 Jan 2022
  • disclosed8 Jun 2009
  • creditUnknown

Introduced: 8 Jun 2009

CVE-2009-1955  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade apr to version 1.3.7 or higher.

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS). 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 Base Scores

version 3.1