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.
Published: 2009-12-04
Score: 5.0 Medium
EPSS: 3.0% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DSA Debian DSA DSA-1953-1 New expat packages fix denial of service
Debian DSA Debian DSA DSA-1953-2 New expat packages fix regression
Debian DSA Debian DSA DSA-1977-1 New python packages fix several vulnerabilities
EUVD EUVD EUVD-2009-3541 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.
Ubuntu USN Ubuntu USN USN-890-1 Expat vulnerabilities
Ubuntu USN Ubuntu USN USN-890-2 Python 2.5 vulnerabilities
Ubuntu USN Ubuntu USN USN-890-3 Python 2.4 vulnerabilities
Ubuntu USN Ubuntu USN USN-890-4 PyXML vulnerabilities
Ubuntu USN Ubuntu USN USN-890-5 XML-RPC for C and C++ vulnerabilities
Ubuntu USN Ubuntu USN USN-890-6 CMake vulnerabilities
References
Link Providers
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?r1=1.164&r2=1.165 cve-icon cve-icon
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?view=log#rev1.165 cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html cve-icon cve-icon
http://lists.vmware.com/pipermail/security-announce/2010/000082.html cve-icon cve-icon
http://mail.python.org/pipermail/expat-bugs/2009-November/002846.html cve-icon cve-icon
http://marc.info/?l=bugtraq&m=130168502603566&w=2 cve-icon cve-icon
http://secunia.com/advisories/37537 cve-icon cve-icon
http://secunia.com/advisories/38231 cve-icon cve-icon
http://secunia.com/advisories/38794 cve-icon cve-icon
http://secunia.com/advisories/38832 cve-icon cve-icon
http://secunia.com/advisories/38834 cve-icon cve-icon
http://secunia.com/advisories/39478 cve-icon cve-icon
http://secunia.com/advisories/41701 cve-icon cve-icon
http://secunia.com/advisories/43300 cve-icon cve-icon
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026 cve-icon cve-icon
http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1 cve-icon cve-icon
http://www.debian.org/security/2009/dsa-1953 cve-icon cve-icon
http://www.mandriva.com/security/advisories?name=MDVSA-2009:316 cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2011-0896.html cve-icon cve-icon
http://www.securityfocus.com/bid/37203 cve-icon cve-icon
http://www.securitytracker.com/id?1023278 cve-icon cve-icon
http://www.ubuntu.com/usn/USN-890-1 cve-icon cve-icon
http://www.ubuntu.com/usn/USN-890-6 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/0528 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/0896 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/1107 cve-icon cve-icon
http://www.vupen.com/english/advisories/2011/0359 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=533174 cve-icon cve-icon
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rad2acee3ab838b52c04a0698b1728a9a43467bf365bd481c993c535d%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/reb7c64aeea604bf948467d9d1cab8ff23fa7d002be1964bcc275aae7%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2009-3560 cve-icon
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10613 cve-icon cve-icon
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12942 cve-icon cve-icon
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6883 cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2009-3560 cve-icon
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00370.html cve-icon cve-icon
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00394.html cve-icon cve-icon
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00413.html cve-icon cve-icon
History

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.04481}

epss

{'score': 0.02244}


Subscriptions

Apache Http Server
Libexpat Project Libexpat
Redhat Enterprise Linux Jboss Enterprise Application Platform Jboss Enterprise Web Server
Xmltwig Xml-twig For Perl
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-07T06:31:10.684Z

Reserved: 2009-10-05T00:00:00.000Z

Link: CVE-2009-3560

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2009-12-04T21:30:00.500

Modified: 2026-04-23T00:35:47.467

Link: CVE-2009-3560

cve-icon Redhat

Severity : Moderate

Publid Date: 2009-12-02T00:00:00Z

Links: CVE-2009-3560 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses