National Vulnerability Database

National Vulnerability Database

National Vulnerability

CVE-2009-2473 Detail


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.

Source:  MITRE      Last Modified:  08/21/2009

Quick Info

CVE Dictionary Entry:
Original release date:
Last revised:


CVSS Severity (version 2.0):
CVSS v2 Base Score:
(AV:N/AC:M/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore:
Exploitability Subscore:
CVSS Version 2 Metrics:
Access Vector:
Network exploitable - Victim must voluntarily interact with attack mechanism
Access Complexity:
Not required to exploit
Impact Type:
Allows disruption of service

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: 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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Hyperlink Resource Type Source Name External Source APPLE APPLE-SA-2010-11-10-1 External Source MLIST [neon] 20090818 neon: release 0.28.6 (SECURITY) External Source MLIST [neon] 20090818 CVE-2009-2473: fix for "billion laughs" attack against expat External Source SUSE SUSE-SR:2009:018 External Source REDHAT RHSA-2013:0131 External Source CONFIRM External Source MANDRIVA MDVSA-2009:221 Patch; Vendor Advisory External Source VUPEN ADV-2009-2341 External Source XF neon-xml-dos(52633) External Source OVAL oval:org.mitre.oval:def:9461 External Source FEDORA FEDORA-2009-8794 External Source FEDORA FEDORA-2009-8815

References to Check Content

Check System:

Technical Details

Vulnerability Type (View All)

  • Resource Management Errors (CWE-399)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1

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Change History 4 change records found - show changes