CVE-2018-10901 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  Red Hat, Inc.
Base Score:  7.8 HIGH
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/104905 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2018:2390 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2391 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2392 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2393 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2394 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901 Issue Tracking  Patch  Third Party Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36 Patch  Vendor Advisory 
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  
CWE-665 Improper Initialization Contributor acceptance level Red Hat, Inc.  

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-10901
NVD Published Date:
07/26/2018
NVD Last Modified:
07/14/2020
Source:
Red Hat, Inc.