// For flags

CVE-2009-3720

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

Severity Score

5.0
*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*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.

*Credits: N/A
CVSS Scores
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
  • 2024-07-24 EPSS Updated
  • 2024-08-07 CVE Updated
  • 2024-08-07 First Exploit
  • ---------- 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