Gentoo alert 200305-09 (heimdal)
| From: | Daniel Ahlberg <aliz@gentoo.org> | |
| To: | gentoo-announce@gentoo.org | |
| Subject: | GLSA: heimdal (200305-09) | |
| Date: | Tue, 27 May 2003 10:46:54 +0200 |
-----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-----