Linux Kernel up to 5.9.6 fbcon drivers/tty/vt/vt.c KD_FONT_OP_COPY out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 5.9.6. This affects the function KD_FONT_OP_COPY of the file drivers/tty/vt/vt.c of the component fbcon. The manipulation results in out-of-bounds. This vulnerability is reported as CVE-2020-28974. The attack requires a local approach. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.9.6 (Operating System). Affected is the function KD_FONT_OP_COPY of the file drivers/tty/vt/vt.c of the component fbcon. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 11/21/2020. The advisory is available at seclists.org. This vulnerability is traded as CVE-2020-28974. Technical details are known, but there is no available exploit.

Upgrading to version 5.9.7 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. 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.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

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

NVD Base Score: 4.6
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

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 5.9.7
Patch: git.kernel.org

Timelineinfo

11/20/2020 🔍
11/21/2020 +1 days 🔍
11/21/2020 +0 days 🔍
12/09/2020 +18 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Status: Confirmed

CVE: CVE-2020-28974 (🔍)
GCVE (CVE): GCVE-0-2020-28974
GCVE (VulDB): GCVE-100-165222

Entryinfo

Created: 11/21/2020 07:25
Updated: 12/09/2020 18:27
Changes: 11/21/2020 07:25 (44), 12/09/2020 18:24 (5), 12/09/2020 18:27 (18)
Complete: 🔍
Cache ID: 216::103

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