CVE-2009-3720

expat: buffer over-read and crash on XML with malformed UTF-8 sequences

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.

La función updatePosition en lib/xmltok_impl.c en libexpat en Expat v2.0.1, usado en Python, PyXML, w3c-libwww, ay otros programas, permite a atacantes dependientes de contexto, provocar una denegación de servicio (caída de aplicación) a través de un documento XML con una secuencia de caracteres UTF-8 manipulada que provoca un desbordamiento de búfer fuera de límite (over-read). Vulnerabilidad distinta de CVE-2009-2625.

This advisory provides additional information for APPLE-SA-2017-03-22-1. iTunes for Windows 12.6 addresses multiple vulnerabilities in various included software.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2009-10-16 CVE Reserved
2009-11-03 CVE Published
2024-08-07 CVE Updated
2024-08-07 First Exploit
2025-04-03 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (92)

URL	Tag	Source
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?view=log	Mailing List
http://lists.vmware.com/pipermail/security-announce/2010/000082.html	Broken Link
http://mail.python.org/pipermail/expat-bugs/2009-January/002781.html	Mailing List
http://secunia.com/advisories/37324	Broken Link
http://secunia.com/advisories/37537	Broken Link
http://secunia.com/advisories/37925	Broken Link
http://secunia.com/advisories/38050	Broken Link
http://secunia.com/advisories/38231	Broken Link
http://secunia.com/advisories/38794	Broken Link
http://secunia.com/advisories/38832	Broken Link
http://secunia.com/advisories/38834	Broken Link
http://secunia.com/advisories/39478	Broken Link
http://secunia.com/advisories/41701	Broken Link
http://secunia.com/advisories/42326	Broken Link
http://secunia.com/advisories/42338	Broken Link
http://secunia.com/advisories/43300	Broken Link
http://sourceforge.net/tracker/index.php?func=detail&aid=1990430&group_id=10127&atid=110127	Mailing List
http://www.openwall.com/lists/oss-security/2009/08/21/2	Mailing List
http://www.openwall.com/lists/oss-security/2009/08/26/3	Mailing List
http://www.openwall.com/lists/oss-security/2009/08/26/4	Mailing List
http://www.openwall.com/lists/oss-security/2009/08/27/6	Mailing List
http://www.openwall.com/lists/oss-security/2009/09/06/1	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/22/5	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/22/9	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/23/2	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/23/6	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/26/3	Mailing List
http://www.openwall.com/lists/oss-security/2009/10/28/3	Mailing List
http://www.securitytracker.com/id?1023160	Third Party Advisory
http://www.vupen.com/english/advisories/2010/0528	Broken Link
http://www.vupen.com/english/advisories/2010/0896	Broken Link
http://www.vupen.com/english/advisories/2010/1107	Broken Link
http://www.vupen.com/english/advisories/2010/3035	Broken Link
http://www.vupen.com/english/advisories/2010/3053	Broken Link
http://www.vupen.com/english/advisories/2010/3061	Broken Link
http://www.vupen.com/english/advisories/2011/0359	Broken Link
https://bugs.gentoo.org/show_bug.cgi?id=280615	Third Party Advisory
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rad2acee3ab838b52c04a0698b1728a9a43467bf365bd481c993c535d%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/reb7c64aeea604bf948467d9d1cab8ff23fa7d002be1964bcc275aae7%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11019	Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12719	Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7112	Mailing List

URL	Date	SRC
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?r1=1.13&r2=1.15&view=patch	2024-08-07

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051228.html	2024-02-22
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051247.html	2024-02-22
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051367.html	2024-02-22
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051405.html	2024-02-22
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051442.html	2024-02-22
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html	2024-02-22
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html	2024-02-22
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html	2024-02-22
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html	2024-02-22
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html	2024-02-22
http://marc.info/?l=bugtraq&m=130168502603566&w=2	2024-02-22
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026	2024-02-22
http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:212	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:215	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:216	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:217	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:218	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:219	2024-02-22
http://www.mandriva.com/security/advisories?name=MDVSA-2009:220	2024-02-22
http://www.redhat.com/support/errata/RHSA-2010-0002.html	2024-02-22
http://www.redhat.com/support/errata/RHSA-2011-0896.html	2024-02-22
http://www.ubuntu.com/usn/USN-890-1	2024-02-22
http://www.ubuntu.com/usn/USN-890-6	2024-02-22
https://bugzilla.redhat.com/show_bug.cgi?id=531697	2017-11-16
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00370.html	2024-02-22
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00413.html	2024-02-22
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg01274.html	2024-02-22
https://access.redhat.com/security/cve/CVE-2009-3720	2017-11-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libexpat Project Search vendor "Libexpat Project"	Libexpat Search vendor "Libexpat Project" for product "Libexpat"	2.0.1 Search vendor "Libexpat Project" for product "Libexpat" and version "2.0.1"	-	Affected	in	A M Kuchling Search vendor "A M Kuchling"	Pyxml Search vendor "A M Kuchling" for product "Pyxml"	*	-	Safe
Libexpat Project Search vendor "Libexpat Project"	Libexpat Search vendor "Libexpat Project" for product "Libexpat"	2.0.1 Search vendor "Libexpat Project" for product "Libexpat" and version "2.0.1"	-	Affected	in	Python Search vendor "Python"	Python Search vendor "Python" for product "Python"	*	-	Safe
Apache Search vendor "Apache"		Http Server Search vendor "Apache" for product "Http Server"				>= 2.0.35 < 2.0.64 Search vendor "Apache" for product "Http Server" and version " >= 2.0.35 < 2.0.64"		-		Affected
Apache Search vendor "Apache"		Http Server Search vendor "Apache" for product "Http Server"				>= 2.2.0 < 2.2.17 Search vendor "Apache" for product "Http Server" and version " >= 2.2.0 < 2.2.17"		-		Affected