{"id":"CVE-2010-0433","aliases":["EUVD-2010-0464","GHSA-5gv7-x3p9-2mf6","RHSA-2010:0162"],"status":"published","title":"The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is...","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.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.07857,"percentile":0.94733,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2010-03-05T19:00:00Z","modified":"2026-06-29T10:03:07Z","affected":[{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client_workstation","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client_workstation","package":"openssl-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client_workstation","package":"openssl-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"openssl-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::client","package":"openssl-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"openssl-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"openssl-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:5::server","package":"openssl-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.9.8e-12.el5_4.6"}]}],"bundled":3}],"products":[{"vendor":"openssl","product":"openssl"}],"references":[{"url":"http://www.vupen.com/english/advisories/2010/0916","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://secunia.com/advisories/42724","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://secunia.com/advisories/39461","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9856","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=569774","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"http://marc.info/?l=bugtraq\u0026m=127557640302499\u0026w=2","tags":["vendor-advisory","x_refsource_HP","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12260","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2010/03/03/5","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.mail-archive.com/dovecot%40dovecot.org/msg26224.html","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=567711","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"http://www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2010/0839","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://cvs.openssl.org/chngview?cn=19374","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2010:076","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred"]},{"url":"http://marc.info/?l=bugtraq\u0026m=127128920008563\u0026w=2","tags":["vendor-advisory","x_refsource_HP","x_transferred"]},{"url":"https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://secunia.com/advisories/39932","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://www.openssl.org/news/changelog.html","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2010/0933","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://www.vmware.com/security/advisories/VMSA-2011-0003.html","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://kb.bluecoat.com/index?page=content\u0026id=SA50","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/516397/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://secunia.com/advisories/43311","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2010/1216","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6718","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://secunia.com/advisories/42733","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-April/038587.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"http://aix.software.ibm.com/aix/efixes/security/openssl_advisory.asc","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://groups.google.com/group/mailing.openssl.users/browse_thread/thread/c3e1ab0034ca4b4c/66aa896c3a78b2f7","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-0433","tags":["advisory"]},{"url":"http://www.mail-archive.com/dovecot@dovecot.org/msg26224.html"},{"url":"https://github.com/advisories/GHSA-5gv7-x3p9-2mf6"},{"url":"https://access.redhat.com/errata/RHSA-2010:0162","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"http://kbase.redhat.com/faq/docs/DOC-20491","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=533125","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=570924","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2010/rhsa-2010_0162.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2009-3245","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2009-3245","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3245","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2009-3555","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2009-3555","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3555","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2010-0433","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2010-0433","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2010-0433","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.","status":"published","published":"2010-03-05T19:00:00Z","modified":"2024-08-07T00:52:17.351Z","updated_at":"2026-11-02T14:33:29.582233Z"}],"euvd":[{"id":"EUVD-2010-0464","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.","status":"published","published":"2010-03-05T19:00:00Z","modified":"2024-08-07T00:52:17Z","updated_at":"2026-11-03T01:39:45.195177Z"}],"ghsa":[{"id":"GHSA-5gv7-x3p9-2mf6","title":"The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is...","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.","status":"published","published":"2022-05-02T06:12:42Z","modified":"2023-02-21T05:06:14Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:54:11.906282Z"}],"nvd":[{"id":"CVE-2010-0433","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.","status":"published","published":"2010-03-05T19:30:00.547Z","modified":"2026-06-16T23:16:09.87Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:01:40.249593Z"}],"osv":[{"id":"RHSA-2010:0162","title":"Red Hat Security Advisory: openssl security update","status":"published","published":"2024-09-15T18:19:46Z","modified":"2026-06-29T10:03:07Z","updated_at":"2026-11-02T15:53:00.468834Z"}]}}