CVE-2010-0433

MEDIUM

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.

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/[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/oval%3Aorg.mitre.oval%3Adef%3A12260

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6718

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9856

Details

Source: MITRE

Published: 2010-03-05

Updated: 2018-10-10

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM