CVE-2010-0433 Information

Description

The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n when Kerberos is enabled but Kerberos configuration files cannot be opened does not check a certain return value which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via SSL cipher negotiation as demonstrated by a chroot installation of Dovecot or stunnel without Kerberos configuration files inside the chroot.

Reference

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory.asc http://cvs.openssl.org/chngview?cn=19374 http://groups.google.com/group/mailing.openssl.users/browse_thread/thread/c3e1ab0034ca4b4c/66aa896c3a78b2f7 http://lists.fedoraproject.org/pipermail/package-announce/2010-April/038587.html http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html http://marc.info/?l=bugtraq&m=127128920008563&w=2 http://marc.info/?l=bugtraq&m=127557640302499&w=2 http://secunia.com/advisories/39461 http://secunia.com/advisories/39932 http://secunia.com/advisories/42724 http://secunia.com/advisories/42733 http://secunia.com/advisories/43311 http://www.mail-archive.com/[email protected]/msg26224.html http://www.mandriva.com/security/advisories?name=MDVSA-2010:076 http://www.openssl.org/news/changelog.html http://www.openwall.com/lists/oss-security/2010/03/03/5 http://www.securityfocus.com/archive/1/516397/100/0/threaded http://www.vmware.com/security/advisories/VMSA-2011-0003.html http://www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html http://www.vupen.com/english/advisories/2010/0839 http://www.vupen.com/english/advisories/2010/0916 http://www.vupen.com/english/advisories/2010/0933 http://www.vupen.com/english/advisories/2010/1216 https://bugzilla.redhat.com/show_bug.cgi?id=567711 https://bugzilla.redhat.com/show_bug.cgi?id=569774 https://kb.bluecoat.com/index?page=content&id=SA50 https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A12260 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A6718 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A9856