Ubuntu Security Notice USN-3500-1
29th November, 2017
libxfont, libxfont1, libxfont2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
libXfont could be made to access arbitrary files, including special device files.
Software description
It was discovered that libXfont incorrectly followed symlinks when opening
font files. A local unprivileged user could use this issue to cause the X
server to access arbitrary files, including special device files.
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 17.10:
libxfont1 1:1.5.2-4ubuntu1.1
libxfont2 1:2.0.1-3ubuntu1.1
Ubuntu 17.04:
libxfont1 1:1.5.2-4ubuntu0.2
libxfont2 1:2.0.1-3ubuntu0.2
Ubuntu 16.04 LTS:
libxfont1 1:1.5.1-1ubuntu0.16.04.4
libxfont2 1:2.0.1-3~ubuntu16.04.3
Ubuntu 14.04 LTS:
libxfont1 1:1.4.7-1ubuntu0.4
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
CVE-2017-16611
Continue reading...
29th November, 2017
libxfont, libxfont1, libxfont2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
libXfont could be made to access arbitrary files, including special device files.
Software description
- libxfont - X11 font rasterisation library
- libxfont1 - X11 font rasterisation library
- libxfont2 - X11 font rasterisation library
It was discovered that libXfont incorrectly followed symlinks when opening
font files. A local unprivileged user could use this issue to cause the X
server to access arbitrary files, including special device files.
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 17.10:
libxfont1 1:1.5.2-4ubuntu1.1
libxfont2 1:2.0.1-3ubuntu1.1
Ubuntu 17.04:
libxfont1 1:1.5.2-4ubuntu0.2
libxfont2 1:2.0.1-3ubuntu0.2
Ubuntu 16.04 LTS:
libxfont1 1:1.5.1-1ubuntu0.16.04.4
libxfont2 1:2.0.1-3~ubuntu16.04.3
Ubuntu 14.04 LTS:
libxfont1 1:1.4.7-1ubuntu0.4
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
CVE-2017-16611
Continue reading...
