National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2009-2473 Detail

Description

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:
CVE-2009-2473
Original release date:
08/21/2009
Last revised:
09/18/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
4.3 MEDIUM
Vector:
(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 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: 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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Hyperlink Resource Type Source Name
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html External Source APPLE APPLE-SA-2010-11-10-1
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html External Source MLIST [neon] 20090818 neon: release 0.28.6 (SECURITY)
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html External Source MLIST [neon] 20090818 CVE-2009-2473: fix for "billion laughs" attack against expat
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html External Source SUSE SUSE-SR:2009:018
http://rhn.redhat.com/errata/RHSA-2013-0131.html External Source REDHAT RHSA-2013:0131
http://support.apple.com/kb/HT4435 External Source CONFIRM http://support.apple.com/kb/HT4435
http://www.mandriva.com/security/advisories?name=MDVSA-2009:221 External Source MANDRIVA MDVSA-2009:221
http://www.vupen.com/english/advisories/2009/2341 Patch; Vendor Advisory External Source VUPEN ADV-2009-2341
https://exchange.xforce.ibmcloud.com/vulnerabilities/52633 External Source XF neon-xml-dos(52633)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461 External Source OVAL oval:org.mitre.oval:def:9461
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html External Source FEDORA FEDORA-2009-8794
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html External Source FEDORA FEDORA-2009-8815

References to Check Content

Identifier:
oval:org.mitre.oval:def:9461
Check System:
http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:
http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:9461

Technical Details

Vulnerability Type (View All)

  • Resource Management Errors (CWE-399)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:webdav:neon:0.28.6:*:*:*:*:*:*:*

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History 4 change records found - show changes