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CVE-2017-12154 Affecting kernel-tools package, versions <0:4.9.58-18.51.amzn1

Severity

 Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.06% (28th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELTOOLS-1708555
  • published27 Sept 2021
  • disclosed26 Sept 2017
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Introduced: 26 Sep 2017

CVE-2017-12154  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-tools to version 0:4.9.58-18.51.amzn1 or higher.
This issue was patched in ALAS-2017-914.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.