GLSA-200904-09 : MIT Kerberos 5: Multiple vulnerabilities
Critical Nessus Plugin ID 36137
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200904-09 (MIT Kerberos 5: Multiple vulnerabilities)
Multiple vulnerabilities have been reported in MIT Kerberos 5:
A free() call on an uninitialized pointer in the ASN.1 decoder when decoding an invalid encoding (CVE-2009-0846).
A buffer overread in the SPNEGO GSS-API application, reported by Apple Product Security (CVE-2009-0844).
A NULL pointer dereference in the SPNEGO GSS-API application, reported by Richard Evans (CVE-2009-0845).
An incorrect length check inside an ASN.1 decoder leading to spurious malloc() failures (CVE-2009-0847).
A remote unauthenticated attacker could exploit the first vulnerability to cause a Denial of Service or, in unlikely circumstances, execute arbitrary code on the host running krb5kdc or kadmind with root privileges and compromise the Kerberos key database. Exploitation of the other vulnerabilities might lead to a Denial of Service in kadmind, krb5kdc, or other daemons performing authorization against Kerberos that utilize GSS-API or an information disclosure.
There is no known workaround at this time.
SolutionAll MIT Kerberos 5 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-crypt/mit-krb5-1.6.3-r6'