CVE-2010-0433

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 7.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-03-05 · updated 2026-06-16
Weakness: CWE-20

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.

Affected products

OpenSSL: through 0.9.8m; 0.9.8, 0.9.8a, 0.9.8b, 0.9.8c, 0.9.8d, 0.9.8e (+7)

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

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