PRIOn knowledge basePRION:CVE-2010-0433Null pointer dereference
6.9 Medium
AI Score
Confidence
High
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.08 Low
EPSS
Percentile
94.1%
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.
References
aix.software.ibm.com/aix/efixes/security/openssl_advisory.asc
secunia.com/advisories/39461
secunia.com/advisories/39932
secunia.com/advisories/42724
secunia.com/advisories/42733
secunia.com/advisories/43311
www.mail-archive.com/dovecot%40dovecot.org/msg26224.html
www.mandriva.com/security/advisories?name=MDVSA-2010:076
www.openwall.com/lists/oss-security/2010/03/03/5
www.securityfocus.com/archive/1/516397/100/0/threaded
www.vmware.com/security/advisories/VMSA-2011-0003.html
www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html
www.vupen.com/english/advisories/2010/0839
www.vupen.com/english/advisories/2010/0916
www.vupen.com/english/advisories/2010/0933
www.vupen.com/english/advisories/2010/1216
bugzilla.redhat.com/show_bug.cgi?id=567711
bugzilla.redhat.com/show_bug.cgi?id=569774
cvs.openssl.org/chngview?cn=19374
groups.google.com/group/mailing.openssl.users/browse_thread/thread/c3e1ab0034ca4b4c/66aa896c3a78b2f7
kb.bluecoat.com/index?page=content&id=SA50
lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html
lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html
lists.fedoraproject.org/pipermail/package-announce/2010-April/038587.html
lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html
marc.info/?l=bugtraq&m=127128920008563&w=2
marc.info/?l=bugtraq&m=127557640302499&w=2
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12260
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6718
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9856
www.openssl.org/news/changelog.html
Related
6.9 Medium
AI Score
Confidence
High
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.08 Low
EPSS
Percentile
94.1%