Linux Kernel KVM Virtualization Support access control

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel. This affects an unknown part of the component KVM Virtualization Support. Such manipulation leads to access control. This vulnerability is traded as CVE-2018-10901. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (version unknown) and classified as critical. Affected by this issue is an unknown function of the component KVM Virtualization Support. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 08/02/2018. The weakness was shared 07/26/2018 as confirmed bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2018-10901 since 05/09/2018. Local access is required to approach this attack. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 111733 (RHEL 6 : kernel (RHSA-2018:2392) (Foreshadow)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351257 (Amazon Linux Security Advisory for kernel: ALAS-2018-1023).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111733) and SecurityFocus (BID 104905†). The entries VDB-109965, VDB-111442 and VDB-115114 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 111733
Nessus Name: RHEL 6 : kernel (RHSA-2018:2392) (Foreshadow)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

05/09/2018 🔍
07/26/2018 +78 days 🔍
07/26/2018 +0 days 🔍
07/26/2018 +0 days 🔍
07/27/2018 +1 days 🔍
08/02/2018 +6 days 🔍
08/14/2018 +12 days 🔍
08/15/2018 +1 days 🔍
04/27/2023 +1716 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2392
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-10901 (🔍)
GCVE (CVE): GCVE-0-2018-10901
GCVE (VulDB): GCVE-100-122234
SecurityFocus: 104905 - Linux Kernel CVE-2018-10901 Local Privilege Escalation Vulnerability

See also: 🔍

Entryinfo

Created: 07/27/2018 07:53
Updated: 04/27/2023 08:07
Changes: 07/27/2018 07:53 (74), 03/10/2020 15:43 (6), 04/27/2023 07:58 (5), 04/27/2023 08:05 (12), 04/27/2023 08:07 (1)
Complete: 🔍
Cache ID: 216::103

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