USN-3594-1: Linux kernel vulnerability
linux vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary
The system could be made to expose sensitive information.
Software Description
- linux – Linux kernel
Details
USN-3542-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 14.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:
Jann Horn discovered that microprocessors utilizing speculative execution
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory. (CVE-2017-5715)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 14.04 LTS
- linux-image-3.13.0-143-generic – 3.13.0-143.192
- linux-image-3.13.0-143-generic-lpae – 3.13.0-143.192
- linux-image-3.13.0-143-lowlatency – 3.13.0-143.192
- linux-image-generic – 3.13.0.143.153
- linux-image-generic-lpae – 3.13.0.143.153
- linux-image-lowlatency – 3.13.0.143.153
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.
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
Source: USN-3594-1: Linux kernel vulnerability
