National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-2473)

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Last updated: Wed May 22 19:36:24 EDT 2013

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Vulnerability Summary for CVE-2009-2473

Original release date:08/21/2009

Last revised:02/07/2013

Source: US-CERT/NIST

Overview

neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:4.3 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:N/A:P) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 8.6

CVSS Version 2 Metrics:

Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type:Allows disruption of serviceUnknown

Vendor Statements (disclaimer)

Official Statement from Red Hat (09/22/2009)

Updated neon packages for Red Hat Enterprise Linux 4 and 5 were released via: https://rhn.redhat.com/errata/RHSA-2009-1452.html Embedded copy of the neon library is included in the versions of gnome-vfs2 packages as shipped with Red Hat Enteprise Linux 4 and Red Hat Enteprise Linux 5. The Red Hat Security Response Team has rated this issue as having low security impact on gnome-vfs2, future updates may address this flaw.

References to Advisories, Solutions, and Tools

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External Source: VUPEN

Name: ADV-2009-2341

Type: Advisory; Patch Information

Hyperlink:http://www.vupen.com/english/advisories/2009/2341

External Source: FEDORA

Name: FEDORA-2009-8815

Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html

External Source: FEDORA

Name: FEDORA-2009-8794

Hyperlink:https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html

External Source: XF

Name: neon-xml-dos(52633)