Ubuntu Security Notice USN-3353-1
14th July, 2017
heimdal vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
Heimdal could allow unintended access to network services.
Software description
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 version:
Ubuntu 17.04:
libkrb5-26-heimdal 7.1.0+dfsg-9ubuntu1.1
Ubuntu 16.10:
libkrb5-26-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.10.1
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart any applications
using Heimdal libraries to make all the necessary changes.
References
CVE-2017-11103
Continue reading...
14th July, 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
Heimdal could allow unintended access to network services.
Software description
- heimdal - Heimdal Kerberos Network Authentication Protocol
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 version:
Ubuntu 17.04:
libkrb5-26-heimdal 7.1.0+dfsg-9ubuntu1.1
Ubuntu 16.10:
libkrb5-26-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.10.1
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart any applications
using Heimdal libraries to make all the necessary changes.
References
CVE-2017-11103
Continue reading...
