Test ID:	1.3.6.1.4.1.25623.1.0.53351
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DSA-269)
Summary:	The remote host is missing an update for the Debian 'heimdal' package(s) announced via the DSA-269 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'heimdal' package(s) announced via the DSA-269 advisory. Vulnerability Insight: 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 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. This version of the heimdal package changes the default behavior and disallows cross-realm authentication for Kerberos version 4. Because of the fundamental nature of the problem, cross-realm authentication in Kerberos version 4 cannot be made secure and sites should avoid its use. A new option (--kerberos4-cross-realm) is provided to the kdc command to re-enable version 4 cross-realm authentication for those sites that must use this functionality but desire the other security fixes. For the stable distribution (woody) this problem has been fixed in version 0.4e-7.woody.8. The old stable distribution (potato) is not affected by this problem, since it isn't compiled against kerberos 4. For the unstable distribution (sid) this problem has been fixed in version 0.5.2-1. We recommend that you upgrade your heimdal packages immediately. Affected Software/OS: 'heimdal' package(s) on Debian 3.0. Solution: Please install the updated package(s). CVSS Score: 7.5 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2003-0138 BugTraq ID: 7113 http://www.securityfocus.com/bid/7113 Bugtraq: 20030317 MITKRB5-SA-2003-004: Cryptographic weaknesses in Kerberos v4 protocol (Google Search) http://marc.info/?l=bugtraq&m=104791775804776&w=2 Bugtraq: 20030331 GLSA: krb5 & mit-krb5 (200303-28) (Google Search) http://www.securityfocus.com/archive/1/316960/30/25250/threaded CERT/CC vulnerability note: VU#623217 http://www.kb.cert.org/vuls/id/623217 Debian Security Information: DSA-266 (Google Search) http://www.debian.org/security/2003/dsa-266 Debian Security Information: DSA-269 (Google Search) http://www.debian.org/security/2003/dsa-269 Debian Security Information: DSA-273 (Google Search) http://www.debian.org/security/2003/dsa-273 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A248 http://www.redhat.com/support/errata/RHSA-2003-051.html http://www.redhat.com/support/errata/RHSA-2003-052.html http://www.redhat.com/support/errata/RHSA-2003-091.html
Copyright	Copyright (C) 2008 Greenbone AG

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