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…
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EPSS puts the probability of exploitation in the next 30 days at 24.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 24.31% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- libexpat project/libexpat · apache/http server
- Source
- secalert@redhat.com
References
- http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?r1=1.164&r2=1.165Permissions Required
- http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?view=log#rev1.165Broken Link
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.htmlThird Party Advisory, VDB Entry
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.htmlThird Party Advisory, VDB Entry
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.htmlThird Party Advisory, VDB Entry
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.htmlThird Party Advisory, VDB Entry
- http://lists.vmware.com/pipermail/security-announce/2010/000082.htmlBroken Link
- http://mail.python.org/pipermail/expat-bugs/2009-November/002846.htmlExploit
- http://marc.info/?l=bugtraq&m=130168502603566&w=2Mailing List, Third Party Advisory
- http://secunia.com/advisories/37537Broken Link
- http://secunia.com/advisories/38231Broken Link
- http://secunia.com/advisories/38794Broken Link
- http://secunia.com/advisories/38832Broken Link
- http://secunia.com/advisories/38834Broken Link
- http://secunia.com/advisories/39478Broken Link
- http://secunia.com/advisories/41701Broken Link
- http://secunia.com/advisories/43300Broken Link
- http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026Mailing List, Third Party Advisory
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1Mailing List, Third Party Advisory
- http://www.debian.org/security/2009/dsa-1953Third Party Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:316Broken Link
- http://www.redhat.com/support/errata/RHSA-2011-0896.htmlBroken Link
- http://www.securityfocus.com/bid/37203Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id?1023278Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-890-1Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-890-6Third Party Advisory
- http://www.vupen.com/english/advisories/2010/0528Broken Link
- http://www.vupen.com/english/advisories/2010/0896Broken Link
- http://www.vupen.com/english/advisories/2010/1107Broken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.