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.
Remediation
References
Related Vulnerabilities
phpMyAdmin Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-6830)
WordPress Plugin LearnPress-WordPress LMS Multiple Vulnerabilities (3.0.12)
Tornado URL Redirection to Untrusted Site ('Open Redirect') Vulnerability (CVE-2023-28370)