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Amazon Linux AMI: CVE-2018-10901: Security patch for kernel (ALAS-2018-1023)

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Amazon Linux AMI: CVE-2018-10901: Security patch for kernel (ALAS-2018-1023)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
07/26/2018
Created
03/19/2019
Added
09/07/2018
Modified
05/07/2019

Description

A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • amazon-linux-upgrade-kernel

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