Login
Newsletter
Werbung

Sicherheit: Protokollfehler in heimdal
Aktuelle Meldungen Distributionen
Name: Protokollfehler in heimdal
ID: 200305-09
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Mi, 28. Mai 2003, 13:00
Referenzen: Keine Angabe
Applikationen: Heimdal

Originalnachricht

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

--------------------------------------------------------------------
GENTOO LINUX SECURITY ANNOUNCEMENT 200305-09
--------------------------------------------------------------------

PACKAGE : heimdal
SUMMARY : protocol bug in the kerberos v4 cross-realm operation
DATE : 2003-05-27 08:46 UTC
EXPLOIT : remote
VERSIONS AFFECTED : <heimdal-0.6
FIXED VERSION : >=heimdal-0.6
CVE : CAN-2003-0139 CAN-2003-0138

--------------------------------------------------------------------

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
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt

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 http://cvs.gentoo.org/~aliz
--------------------------------------------------------------------
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)

iD8DBQE+0yX+fT7nyhUpoZMRAqomAJwOF+s21nzkJEg1TXKMIU6YLQa1wwCgmd5U
X2oFKeabiL/2Q3TVIeYQIbM=
=PnXC
-----END PGP SIGNATURE-----
Pro-Linux
Gewinnspiel
Neue Nachrichten
Werbung