Linux Kernel up to 5.8.5 Kernel Memory cec-api.c log_addrs information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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2.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.8.5. This issue affects the function log_addrs of the file drivers/media/cec/core/cec-api.c of the component Kernel Memory Handler. The manipulation results in information disclosure. This vulnerability is reported as CVE-2020-36766. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.8.5 (Operating System). It has been classified as problematic. Affected is the function log_addrs of the file drivers/media/cec/core/cec-api.c of the component Kernel Memory Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.

The weakness was disclosed 09/18/2023 as 6c42227c3467549ddc65efe99c869021d2f4a570. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2020-36766 since 09/18/2023. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 5.8.6 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch 6c42227c3467549ddc65efe99c869021d2f4a570 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.9

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.8.6
Patch: 6c42227c3467549ddc65efe99c869021d2f4a570

Timelineinfo

09/18/2023 🔍
09/18/2023 +0 days 🔍
09/18/2023 +0 days 🔍
10/12/2023 +24 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 6c42227c3467549ddc65efe99c869021d2f4a570
Status: Confirmed

CVE: CVE-2020-36766 (🔍)
GCVE (CVE): GCVE-0-2020-36766
GCVE (VulDB): GCVE-100-239892

Entryinfo

Created: 09/18/2023 14:22
Updated: 10/12/2023 18:36
Changes: 09/18/2023 14:22 (47), 10/12/2023 18:36 (11)
Complete: 🔍
Cache ID: 216::103

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