USN-2599-1: Linux kernel (Utopic HWE) vulnerability
05 May 2015
The system could be made to run programs as an administrator.
- linux-lts-utopic - Linux hardware enablement kernel from Utopic
A race condition between chown() and execve() was discovered in the Linux
kernel. A local attacker could exploit this race by using chown on a
setuid-user-binary to gain administrative privileges.
The problem can be corrected by updating your system to the following package versions:
- linux-image-3.16.0-37-generic - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-generic-lpae - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-lowlatency - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-powerpc-e500mc - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-powerpc-smp - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-powerpc64-emb - 3.16.0-37.49~14.04.1
- linux-image-3.16.0-37-powerpc64-smp - 3.16.0-37.49~14.04.1
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.