USN-2799-1: Linux kernel vulnerabilities
5 November 2015
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
It was discovered that in certain situations, a directory could be renamed outside of a bind mounted location. An attacker could use this to escape bind mount containment and gain access to sensitive information. (CVE-2015-2925)
Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained hardcoded attributes about the USB devices. An attacker could construct a fake WhiteHEAT USB device that, when inserted, causes a denial of service (system crash). (CVE-2015-5257)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 15.04
- linux-image-3.19.0-32-generic - 3.19.0-32.37
- linux-image-3.19.0-32-generic-lpae - 3.19.0-32.37
- linux-image-3.19.0-32-lowlatency - 3.19.0-32.37
- linux-image-3.19.0-32-powerpc-e500mc - 3.19.0-32.37
- linux-image-3.19.0-32-powerpc-smp - 3.19.0-32.37
- linux-image-3.19.0-32-powerpc64-emb - 3.19.0-32.37
- linux-image-3.19.0-32-powerpc64-smp - 3.19.0-32.37
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.
ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.