National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

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.

Source:  MITRE
Description Last Modified:  07/26/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 1.8

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.2 HIGH
Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C) (V2 legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9

Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

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

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Control (CWE-264)

Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-10901
NVD Published Date:
07/26/2018
NVD Last Modified:
10/02/2018