Gentoo: 200305-09 Critical Heimdal Kerberos Protocol Bug Remote Exploit

GENTOO LINUX SECURITY ANNOUNCEMENT 200305-09


heimdal suffers from the same vulnerability as mit-krb5 does, hence
the identical advisory.

- - From advisory:
"A cryptographic weakness in version 4 of the Kerberos protocol allows
an attacker to use a chosen-plaintext attack to impersonate any
principal in a realm.  Additional cryptographic weaknesses in the krb4
implementation included in the MIT krb5 distribution permit the use of
cut-and-paste attacks to fabricate krb4 tickets for unauthorized
client principals if triple-DES keys are used to key krb4 services.
These attacks can subvert a site's entire Kerberos authentication
infrastructure."

Read the full advisory at 
mit

SOLUTION

It is recommended that all Gentoo Linux users who are running
app-crypt/heimdal upgrade to heimdal-0.6 as follows

emerge sync
emerge heimdal
emerge clean

aliz@gentoo.org - GnuPG key is available at