Ubuntu Security Notice 3908-1 - Jann Horn discovered a race condition in the fork system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations.
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Ubuntu Security Notice USN-3908-1
March 12, 2019
linux vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary:
The system could be made to run programs as an administrator.
Software Description:
- linux: Linux kernel
Details:
Jann Horn discovered a race condition in the fork() system call in the
Linux kernel. A local attacker could use this to gain access to services
that cache authorizations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
linux-image-3.13.0-166-generic 3.13.0-166.216
linux-image-3.13.0-166-generic-lpae 3.13.0-166.216
linux-image-3.13.0-166-lowlatency 3.13.0-166.216
linux-image-3.13.0-166-powerpc-e500 3.13.0-166.216
linux-image-3.13.0-166-powerpc-e500mc 3.13.0-166.216
linux-image-3.13.0-166-powerpc-smp 3.13.0-166.216
linux-image-3.13.0-166-powerpc64-emb 3.13.0-166.216
linux-image-3.13.0-166-powerpc64-smp 3.13.0-166.216
linux-image-generic 3.13.0.166.177
linux-image-generic-lpae 3.13.0.166.177
linux-image-lowlatency 3.13.0.166.177
linux-image-powerpc-e500 3.13.0.166.177
linux-image-powerpc-e500mc 3.13.0.166.177
linux-image-powerpc-smp 3.13.0.166.177
linux-image-powerpc64-emb 3.13.0.166.177
linux-image-powerpc64-smp 3.13.0.166.177
linux-image-virtual 3.13.0.166.177
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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://usn.ubuntu.com/usn/usn-3908-1
CVE-2019-6133
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-166.216