| Description: | Description:
The remote host is missing updates announced in
advisory RHSA-2008:0180.
Kerberos is a network authentication system which allows clients and
servers to authenticate to each other through use of symmetric encryption
and a trusted third party, the KDC.
A flaw was found in the way the MIT Kerberos Authentication Service and Key
Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets.
An unauthenticated remote attacker could use this flaw to crash the
krb5kdc daemon, disclose portions of its memory, or possibly execute
arbitrary code using malformed or truncated Kerberos v4 protocol
requests. (CVE-2008-0062, CVE-2008-0063)
This issue only affected krb5kdc with Kerberos v4 protocol compatibility
enabled, which is the default setting on Red Hat Enterprise Linux 4.
Kerberos v4 protocol support can be disabled by adding v4_mode=none
(without the quotes) to the [kdcdefaults] section of
/var/kerberos/krb5kdc/kdc.conf.
Red Hat would like to thank MIT for reporting these issues.
A double-free flaw was discovered in the GSSAPI library used by MIT
Kerberos. This flaw could possibly cause a crash of the application using
the GSSAPI library. (CVE-2007-5971)
All krb5 users are advised to update to these erratum packages which
contain backported fixes to correct these issues.
Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date
http://rhn.redhat.com/errata/RHSA-2008-0180.html
http://www.redhat.com/security/updates/classification/#critical
Risk factor : Critical
CVSS Score:
9.3
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