The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-0846
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10694
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5483
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6301
• https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.html
• https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.html
• http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
• http://lists.vmware.com/pipermail/security-announce/2009/000059.html
• http://marc.info/?l=bugtraq&m=124896429301168&w=2
• http://marc.info/?l=bugtraq&m=130497213107107&w=2
• http://rhn.redhat.com/errata/RHSA-2009-0409.html
• http://rhn.redhat.com/errata/RHSA-2009-0410.html
• http://secunia.com/advisories/34594
• http://secunia.com/advisories/34598
• http://secunia.com/advisories/34617
• http://secunia.com/advisories/34622
• http://secunia.com/advisories/34628
• http://secunia.com/advisories/34630
• http://secunia.com/advisories/34637
• http://secunia.com/advisories/34640
• http://secunia.com/advisories/34734
• http://secunia.com/advisories/35074
• http://secunia.com/advisories/35667
• http://security.gentoo.org/glsa/glsa-200904-09.xml
• http://sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1
• http://support.apple.com/kb/HT3549
• http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm
• http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html
• http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html
• http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt
• http://wiki.rpath.com/Advisories:rPSA-2009-0058
• http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058
• http://www-01.ibm.com/support/docview.wss?uid=swg21396120
• http://www.kb.cert.org/vuls/id/662091
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:098
• http://www.redhat.com/support/errata/RHSA-2009-0408.html
• http://www.securityfocus.com/archive/1/502527/100/0/threaded
• http://www.securityfocus.com/archive/1/502546/100/0/threaded
• http://www.securityfocus.com/archive/1/504683/100/0/threaded
• http://www.securityfocus.com/bid/34409
• http://www.securitytracker.com/id?1021994
• http://www.ubuntu.com/usn/usn-755-1
• http://www.us-cert.gov/cas/techalerts/TA09-133A.html
• http://www.vmware.com/security/advisories/VMSA-2009-0008.html
• http://www.vupen.com/english/advisories/2009/0960
• http://www.vupen.com/english/advisories/2009/0976
• http://www.vupen.com/english/advisories/2009/1057
• http://www.vupen.com/english/advisories/2009/1106
• http://www.vupen.com/english/advisories/2009/1297
• http://www.vupen.com/english/advisories/2009/2084
• http://www.vupen.com/english/advisories/2009/2248