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Vulnerability Details : CVE-2009-2473

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.
Publish Date : 2009-08-21 Last Update Date : 2017-09-18
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 399

- Vendor Statements

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.
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat low
4.3
AV:N/AC:M/Au:N/C:N/I:N/A:P 2009-08-06 2009-08-18
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-2473 oval:org.opensuse.security:def:20092473 unix
DEPRECATED: ELSA-2013-0131 -- gnome-vfs2 security and bug fix update (low) oval:org.mitre.oval:def:27176 unix
ELSA-2009:1452: neon security update (Moderate) oval:org.mitre.oval:def:22944 unix
ELSA-2013:0131: gnome-vfs2 security and bug fix update (Low) oval:org.mitre.oval:def:23415 unix
neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context... oval:org.mitre.oval:def:9461 unix
RHSA-2009:1452 -- neon security update (Moderate) oval:org.mitre.oval:def:29270 unix
RHSA-2009:1452: neon security update (Moderate) oval:com.redhat.rhsa:def:20091452 unix
RHSA-2013:0131: gnome-vfs2 security and bug fix update (Low) oval:com.redhat.rhsa:def:20130131 unix
RHSA-2013:0131: gnome-vfs2 security and bug fix update (Low) oval:org.mitre.oval:def:21012 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-2473

# Product Type Vendor Product Version Update Edition Language
1 Application Webdav Neon 0.28.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Webdav Neon 1

- References For CVE-2009-2473

https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html
FEDORA FEDORA-2009-8815
https://exchange.xforce.ibmcloud.com/vulnerabilities/52633
XF neon-xml-dos(52633)
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html
FEDORA FEDORA-2009-8794
http://www.vupen.com/english/advisories/2009/2341
VUPEN ADV-2009-2341
http://www.mandriva.com/security/advisories?name=MDVSA-2009:221
MANDRIVA MDVSA-2009:221
http://support.apple.com/kb/HT4435 CONFIRM
http://rhn.redhat.com/errata/RHSA-2013-0131.html
REDHAT RHSA-2013:0131
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
SUSE SUSE-SR:2009:018
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html
MLIST [neon] 20090818 neon: release 0.28.6 (SECURITY)
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html
MLIST [neon] 20090818 CVE-2009-2473: fix for "billion laughs" attack against expat
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
APPLE APPLE-SA-2010-11-10-1

- Metasploit Modules Related To CVE-2009-2473

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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