CVE-2010-0433
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…
Does this matter?
Lower severity and a low EPSS score (7.86%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
- EPSS
- 7.86% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
EPSS 7.9% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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/dovecot%40dovecot.org/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/oval%3Aorg.mitre.oval%3Adef%3A12260
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6718
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.