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[RHSA-2003:091-01] Updated kerberos packages fix various vulnerabilities


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Date: Wed, 2 Apr 2003 04:57 -0500
From: [email protected]
To: [email protected], [email protected]
Subject: [RHSA-2003:091-01] Updated kerberos packages fix various vulnerabilities

---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated kerberos packages fix various vulnerabilities
Advisory ID:       RHSA-2003:091-01
Issue date:        2003-04-02
Updated on:        2003-04-02
Product:           Red Hat Linux
Ключевые слова: , , , , , , , , , krb5,  (найти похожие документы)
Cross references: RHSA-2003:051 RHSA-2003:052 Obsoletes: RHSA-2003:021 CVE Names: CAN-2003-0028 CAN-2003-082 CAN-2003-0138 CAN-2003-0139 --------------------------------------------------------------------- 1. Topic: Updated Kerberos packages for Red Hat Linux 9 fix a number of vulnerabilities found in MIT Kerberos. 2. Relevant releases/architectures: Red Hat Linux 9 - i386 3. Problem description: Kerberos is a network authentication system. The MIT Kerberos team released an advisory describing a number of vulnerabilities that affect the kerberos packages shipped as part of Red Hat Linux 9. These issues include: Vulnerabilities have been found in the triple-DES key support found in the implementation of the Kerberos IV authentication protocol included in MIT Kerberos. The Common Vulnerabilities and Exposures project has assigned the name CAN-2003-0139 to this issue. Vulnerabilities have been found in the Kerberos IV authentication protocol which allow an attacker with knowledge of a cross-realm key, which is shared with another realm, to impersonate any principal in that realm to any service in that realm. This vulnerability can only be closed by disabling cross-realm authentication in Kerberos IV (CAN-2003-0138). Vulnerabilities have been found in the RPC library used by the kadmin service in Kerberos 5. A faulty length check in the RPC library exposes kadmind to an integer overflow which can be used to crash kadmind (CAN-2003-0028). The Key Distribution Center (KDC) allows remote, authenticated attackers to cause a denial of service (crash) on KDCs within the same realm via a certain protocol request that causes the KDC to corrupt its heap (CAN-2003-0082).=20=20 All users of Kerberos are advised to upgrade to these errata packages, which disable cross-realm authentication by default for Kerberos IV and which contain patches that correct these issues. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. RPMs required: Red Hat Linux 9: SRPMS: ftp://updates.redhat.com/9/en/os/SRPMS/krb5-1.2.7-14.src.rpm i386: ftp://updates.redhat.com/9/en/os/i386/krb5-devel-1.2.7-14.i386.rpm ftp://updates.redhat.com/9/en/os/i386/krb5-libs-1.2.7-14.i386.rpm ftp://updates.redhat.com/9/en/os/i386/krb5-server-1.2.7-14.i386.rpm ftp://updates.redhat.com/9/en/os/i386/krb5-workstation-1.2.7-14.i386.rpm 6. Verification: MD5 sum Package Name -------------------------------------------------------------------------- a8520da58b790a356d0a94ae75f7957b 9/en/os/SRPMS/krb5-1.2.7-14.src.rpm 49e7783cb50c3694411b7856d098eff5 9/en/os/i386/krb5-devel-1.2.7-14.i386.rpm 6cb5040d3a4bd21a801e8c1e5da6388d 9/en/os/i386/krb5-libs-1.2.7-14.i386.rpm 8eb2a755c2fdf52b779960ec66cc6783 9/en/os/i386/krb5-server-1.2.7-14.i386.rpm bbcde88fa4f273c7c45a927dc5b40d58 9/en/os/i386/krb5-workstation-1.2.7-14.i38= 6.rpm These packages are GPG signed by Red Hat for security. Our key is available at http://www.redhat.com/solutions/security/news/publickey/ You can verify each package with the following command: =20=20=20=20 rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: =20=20=20=20 md5sum <filename> 7. References: http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-005-buf.txt http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-003-xdr.txt http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2003-0028 http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2003-082 http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2003-0138 http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2003-0139 8. Contact: The Red Hat security contact is <[email protected]>. More contact details at http://www.redhat.com/solutions/security/news/contact/ Copyright 2003 Red Hat, Inc.

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