Linux Kernel up to 6.2 Spectre Mitigation bugs.c spectre_v2_user_select_mitigation information exposure

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5.2	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 6.2. The affected element is the function spectre_v2_user_select_mitigation of the file arch/x86/kernel/cpu/bugs.c of the component Spectre Mitigation. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2023-1998. The attack needs to be performed locally. Additionally, an exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.2 (Operating System). This issue affects the function spectre_v2_user_select_mitigation of the file arch/x86/kernel/cpu/bugs.c of the component Spectre Mitigation. Using CWE to declare the problem leads to CWE-203. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. The impact remains unknown.

The weakness was released 04/21/2023. It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2023-1998 since 04/12/2023. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 6.3-rc1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 6921ed9049bc7457f66c1596c5b78aec0dae4a9d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Exploit-DB (51384). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.6
CNA Vector (Google Inc.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Information exposure
CWE: CWE-203 / CWE-200 / CWE-284
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.3-rc1
Patch: 6921ed9049bc7457f66c1596c5b78aec0dae4a9d

Timelineinfo

04/12/2023 🔍
04/21/2023 +9 days 🔍
04/21/2023 +0 days 🔍
07/29/2024 +464 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 6921ed9049bc7457f66c1596c5b78aec0dae4a9d
Status: Confirmed

CVE: CVE-2023-1998 (🔍)
GCVE (CVE): GCVE-0-2023-1998
GCVE (VulDB): GCVE-100-226991
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/21/2023 10:50
Updated: 07/29/2024 00:09
Changes: 04/21/2023 10:50 (43), 05/15/2023 10:47 (2), 05/15/2023 10:53 (14), 05/15/2023 10:59 (1), 07/29/2024 00:09 (23)
Complete: 🔍
Cache ID: 216::103