17 July 2017
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1760 Heimdal vulnerability 17 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libkrb5-26-heimdal Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-11103 Reference: ESB-2017.1741 Original Bulletin: http://www.ubuntu.com/usn/usn-3353-1 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3353-1 July 14, 2017 heimdal vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.04 - - Ubuntu 16.10 - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Heimdal could allow unintended access to network services. Software Description: - - heimdal: Heimdal Kerberos Network Authentication Protocol Details: Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered that Heimdal clients incorrectly trusted unauthenticated portions of Kerberos tickets. A remote attacker could use this to impersonate trusted network services or perform other attacks. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: libkrb5-26-heimdal 7.1.0+dfsg-9ubuntu1.1 Ubuntu 16.10: libkrb5-26-heimdal 1.7~git20150920+dfsg-4ubuntu188.8.131.52 Ubuntu 16.04 LTS: libkrb5-26-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1 Ubuntu 14.04 LTS: libkrb5-26-heimdal 1.6~git20131207+dfsg-1ubuntu1.2 After a standard system update you need to restart any applications using Heimdal libraries to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3353-1 CVE-2017-11103 Package Information: https://launchpad.net/ubuntu/+source/heimdal/7.1.0+dfsg-9ubuntu1.1 https://launchpad.net/ubuntu/+source/heimdal/1.7~git20150920+dfsg-4ubuntu184.108.40.206 https://launchpad.net/ubuntu/+source/heimdal/1.7~git20150920+dfsg-4ubuntu1.16.04.1 https://launchpad.net/ubuntu/+source/heimdal/1.6~git20131207+dfsg-1ubuntu1.2 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to firstname.lastname@example.org and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWWwEi4x+lLeg9Ub1AQjucBAAinHotON4tOw+3UIsd1mWXsjGgnFRsQwT CWZ068+8Gfn2AA8YzbZ5JrVb//X8iIRqiwS7ZPbCv+frL45fK3fws5q4GDJTElOd 1tCtOViLzjgK9zQZNVhqL88ikTwThdAHDXrzXIkMVQ2VSURxW2wPJSaEtwkdeCko NNiyf5163yc78XVB0yS3FXF6NzeO4xyEfUAvpY2ZPx1I8Sj5GyHUIx5jdJ7zcMJO qMjAkjUbxHp+K/6c99APXve45NXiJUttA4HPz7ua1xOmEl1QnsgLF57rq66O5g4s R2K30s62wbpywYA88AoUAWKfULgx454hWWd51z71+E2ncP9adGO8NJ7m7eG+xBXh cRgPqEIJmJKefv+JWuoUwvQ9J8llE2oY6eFKoA6xYEoaVP4yaHHLLc+WTDDk9/xz LlU4fjxWlW+PiNDFvilv/8ZzocGLlyqUfhK7xZ3B/F59xTeyu2PGgOq0SYQVczKG 9DOFgrVXKX9IyoWwl8xQTs1hW6dKEDBI4R6r4QaDcYpOKlRhvTietgCtMzquIVdG Ffnxou+KrhUYfqnKRsIuGad804ckmdx3mMVb5eskJtHK8FhbPNQKfObMhXEPyrCk +vTIMSept2bXrXZgLuA67c0MnwngYTRVGgTk3MFNanouUTiNWEsqgwXXlyQUQvXc b7w2zuyN+RA= =KsVC -----END PGP SIGNATURE-----