Vigil@nce - Linux kernel: privilege escalation via MSR
July 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
A local attacker can alter the MSR on the Linux kernel with KVM,
in order to escalate his privileges.
Impacted products: Fedora, Linux.
Severity: 2/4.
Creation date: 20/05/2016.
DESCRIPTION OF THE VULNERABILITY
The Linux kernel can be configured with CONFIG_KVM and SynIC
(Hyper-v Synthetic Interrupt Controller).
However, in this configuration, a local attacker can alter the MSR
(Machine Specific Register).
A local attacker can therefore alter the MSR on the Linux kernel
with KVM, in order to escalate his privileges.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Linux-kernel-privilege-escalation-via-MSR-19671