CVE-2009-3560

N/A Unknown
Published: December 04, 2009 Modified: April 23, 2026
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?r1=1.164&r2=1.165
Source: secalert@redhat.com
Permissions Required
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?view=log#rev1.165
Source: secalert@redhat.com
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html
Source: secalert@redhat.com
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://lists.vmware.com/pipermail/security-announce/2010/000082.html
Source: secalert@redhat.com
Broken Link
http://mail.python.org/pipermail/expat-bugs/2009-November/002846.html
Source: secalert@redhat.com
Exploit
http://marc.info/?l=bugtraq&m=130168502603566&w=2
Source: secalert@redhat.com
Mailing List Third Party Advisory
http://secunia.com/advisories/37537
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/38231
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/38794
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/38832
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/38834
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/39478
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/41701
Source: secalert@redhat.com
Broken Link
http://secunia.com/advisories/43300
Source: secalert@redhat.com
Broken Link
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026
Source: secalert@redhat.com
Mailing List Third Party Advisory
http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1
Source: secalert@redhat.com
Mailing List Third Party Advisory
http://www.debian.org/security/2009/dsa-1953
Source: secalert@redhat.com
Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:316
Source: secalert@redhat.com
Broken Link
http://www.redhat.com/support/errata/RHSA-2011-0896.html
Source: secalert@redhat.com
Broken Link
http://www.securityfocus.com/bid/37203
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1023278
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-890-1
Source: secalert@redhat.com
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-890-6
Source: secalert@redhat.com
Third Party Advisory
http://www.vupen.com/english/advisories/2010/0528
Source: secalert@redhat.com
Broken Link
http://www.vupen.com/english/advisories/2010/0896
Source: secalert@redhat.com
Broken Link
http://www.vupen.com/english/advisories/2010/1107
Source: secalert@redhat.com
Broken Link
http://www.vupen.com/english/advisories/2011/0359
Source: secalert@redhat.com
Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=533174
Source: secalert@redhat.com
Issue Tracking Patch
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rad2acee3ab838b52c04a0698b1728a9a43467bf365bd481c993c535d%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/reb7c64aeea604bf948467d9d1cab8ff23fa7d002be1964bcc275aae7%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
Source: secalert@redhat.com
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10613
Source: secalert@redhat.com
Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12942
Source: secalert@redhat.com
Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6883
Source: secalert@redhat.com
Broken Link
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00370.html
Source: secalert@redhat.com
Mailing List Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00394.html
Source: secalert@redhat.com
Mailing List Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00413.html
Source: secalert@redhat.com
Mailing List Third Party Advisory
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?r1=1.164&r2=1.165
Source: af854a3a-2127-422b-91ae-364da2661108
Permissions Required
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?view=log#rev1.165
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://lists.vmware.com/pipermail/security-announce/2010/000082.html
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://mail.python.org/pipermail/expat-bugs/2009-November/002846.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit
http://marc.info/?l=bugtraq&m=130168502603566&w=2
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://secunia.com/advisories/37537
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/38231
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/38794
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/38832
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/38834
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/39478
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/41701
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://secunia.com/advisories/43300
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://www.debian.org/security/2009/dsa-1953
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:316
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://www.redhat.com/support/errata/RHSA-2011-0896.html
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://www.securityfocus.com/bid/37203
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1023278
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-890-1
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-890-6
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://www.vupen.com/english/advisories/2010/0528
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://www.vupen.com/english/advisories/2010/0896
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://www.vupen.com/english/advisories/2010/1107
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
http://www.vupen.com/english/advisories/2011/0359
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=533174
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Patch
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rad2acee3ab838b52c04a0698b1728a9a43467bf365bd481c993c535d%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/reb7c64aeea604bf948467d9d1cab8ff23fa7d002be1964bcc275aae7%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10613
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12942
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6883
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00370.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00394.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00413.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory

116 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
3.0%
87th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-119

Affected Vendors

libexpat_project apache xmltwig

Related CVEs

CVE-2026-6786 8.1
CVE-2026-6785 8.1
CVE-2026-7041 3.7
CVE-2026-7039 7.8
CVE-2026-7038 3.3