Vulnerability Details : CVE-2018-10901
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.
Products affected by CVE-2018-10901
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-10901
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-10901
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
Red Hat, Inc. | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2018-10901
-
The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2018-10901
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901
1601849 – (CVE-2018-10901) CVE-2018-10901 kernel: kvm: vmx: host GDT limit corruptionIssue Tracking;Patch;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujul2020.html
Oracle Critical Patch Update Advisory - July 2020Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2393
RHSA-2018:2393 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2390
RHSA-2018:2390 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
Security fixes in StruxureWare Data Center Expert v7.6.0 - User assistance for StruxureWare Data Center Expert 7.x - Help Center: Support for EcoStruxure IT, StruxureWare for Data Centers, and NetBotzThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2392
RHSA-2018:2392 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Oracle Critical Patch Update - April 2019Patch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2391
RHSA-2018:2391 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2394
RHSA-2018:2394 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
http://www.securityfocus.com/bid/104905
Linux Kernel CVE-2018-10901 Local Privilege Escalation VulnerabilityThird Party Advisory;VDB Entry
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