VDB-184183 · CVE-2021-42252 · GCVE-0-2021-42252

Linux Kernel up to 5.14.5 Aspeed LPC Control Interface aspeed-lpc-ctrl.c aspeed_lpc_ctrl_mmap comparison

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.14.5. Affected is the function aspeed_lpc_ctrl_mmap of the file drivers/soc/aspeed/aspeed-lpc-ctrl.c of the component Aspeed LPC Control Interface. This manipulation causes comparison. This vulnerability appears as CVE-2021-42252. The attack may be initiated remotely. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.14.5 (Operating System). It has been declared as critical. Affected by this vulnerability is the function aspeed_lpc_ctrl_mmap of the file drivers/soc/aspeed/aspeed-lpc-ctrl.c of the component Aspeed LPC Control Interface. The manipulation with an unknown input leads to a comparison vulnerability. The CWE definition for the vulnerability is CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 10/12/2021. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2021-42252 since 10/11/2021. Technical details and also a exploit are known.

It is declared as proof-of-concept.

Upgrading to version 5.14.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Comparison
CWE: CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.14.6
Patch: git.kernel.org

Timelineinfo

10/11/2021 🔍
10/12/2021 +1 days 🔍
10/12/2021 +0 days 🔍
10/14/2021 +2 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-42252 (🔍)
GCVE (CVE): GCVE-0-2021-42252
GCVE (VulDB): GCVE-100-184183
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/12/2021 09:55
Updated: 10/14/2021 16:00
Changes: 10/12/2021 09:55 (9), 10/12/2021 09:56 (17), 10/12/2021 09:59 (18), 10/14/2021 16:00 (1)
Complete: 🔍
Committer: roga
Cache ID: 216::103