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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


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