Two vulnerabilities have been found in MIT Kerberos 5, which could allow a remote unauthenticated user to execute arbitrary code with root privileges.
|Package||app-crypt/mit-krb5 on all architectures|
|Affected versions||< 1.5.3-r1|
|Unaffected versions||>= 1.5.3-r1|
MIT Kerberos 5 is a suite of applications that implement the Kerberos network protocol. kadmind is the MIT Kerberos 5 administration daemon.
A stack buffer overflow (CVE-2007-3999) has been reported in svcauth_gss_validate() of the RPC library of kadmind. Another vulnerability (CVE-2007-4000) has been found in kadm5_modify_policy_internal(), which does not check the return values of krb5_db_get_policy() correctly.
The RPC related vulnerability can be exploited by a remote unauthenticated attacker to execute arbitrary code with root privileges on the host running kadmind. The second vulnerability requires the remote attacker to be authenticated and to have "modify policy" privileges. It could then also allow for the remote execution of arbitrary code.
There is no known workaround at this time.
All MIT Kerberos 5 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.5.3-r1"
September 11, 2007
September 11, 2007: 01