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Vulnerability Details : CVE-2009-3560

The big2_toUtf8 function in lib/xmltok.c in libexpat in Expat 2.0.1, as used in the XML-Twig module for Perl, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with malformed UTF-8 sequences that trigger a buffer over-read, related to the doProlog function in lib/xmlparse.c, a different vulnerability than CVE-2009-2625 and CVE-2009-3720.
Publish Date : 2009-12-04 Last Update Date : 2017-09-18
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- CVSS Scores & Vulnerability Types

CVSS Score
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 Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflow
CWE ID 119

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
AV:N/AC:L/Au:N/C:N/I:N/A:P 2009-11-03 2009-12-02
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-3560 unix
DSA-1953 expat -- denial of service oval:org.mitre.oval:def:6760 unix
DSA-1953-1 expat -- denial of service oval:org.mitre.oval:def:13655 unix
DSA-1953-2 expat -- denial of service oval:org.mitre.oval:def:13420 unix
DSA-1977 python2.4 python2.5 -- several vulnerabilities oval:org.mitre.oval:def:7152 unix
DSA-1977-1 python - several vulnerabilities oval:org.mitre.oval:def:18064 unix
ELSA-2009:1625: expat security update (Moderate) oval:org.mitre.oval:def:22880 unix
expat DoS oval:org.apache.httpd:def:20093560
Expat Unspecified XML Parsing Remote Denial of Service Vulnerability oval:org.mitre.oval:def:6883 unix
HP-UX Apache Web Server, Remote Information Disclosure, Cross-Site Scripting (XSS), Denial of Service (DoS) oval:org.mitre.oval:def:12942 unix
RHSA-2009:1625 -- expat security update (Moderate) oval:org.mitre.oval:def:29347 unix
RHSA-2009:1625: expat security update (Moderate) oval:com.redhat.rhsa:def:20091625 unix
The big2_toUtf8 function in lib/xmltok.c in libexpat in Expat 2.0.1, as used in the XML-Twig module for Perl, allows con... oval:org.mitre.oval:def:10613 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-2009-3560

# Product Type Vendor Product Version Update Edition Language
1 Application James Clark Expat 2.0.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
James Clark Expat 1

- References For CVE-2009-3560
FEDORA FEDORA-2009-12716
VUPEN ADV-2011-0359
VUPEN ADV-2010-1107
VUPEN ADV-2010-0896
VUPEN ADV-2010-0528
SECTRACK 1023278
BID 37203 Expat XML Parsing Remote Denial of Service Vulnerability Release Date:2019-02-01
MLIST [expat-bugs] 20091108 [ expat-Bugs-2894085 ] expat: buffer over-read and crash in big2_toUtf8()
SLACKWARE SSA:2011-041-02
SUSE SUSE-SR:2010:012
REDHAT RHSA-2011:0896
MLIST [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates
SUSE SUSE-SR:2010:013
SUSE SUSE-SR:2010:014
SUSE SUSE-SR:2010:001

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2009-3560

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

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