CVE-2020-8335 : The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r0xuj70w; A485, BIOS

The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r0xuj70w; A485, BIOS versions up to r0wuj65w; T495 BIOS versions up to r12uj55w; T495s/X395, BIOS versions up to r13uj47w, while the emergency-reset button is pressed which may allow for unauthorized access.

Published 2020-09-01 22:15:10

Updated 2020-09-10 14:56:52

Source Lenovo Group Ltd.

View at NVD, CVE.org

Vulnerability category: Bypass

Exploit prediction scoring system (EPSS) score for CVE-2020-8335

EPSS FAQ

0.07%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 29 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-8335

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.6	MEDIUM	AV:L/AC:L/Au:N/C:P/I:P/A:P	3.9	6.4	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
6.8	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.9	5.9	NIST
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
6.1	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	0.9	5.2	Lenovo Group Ltd.
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

Products affected by CVE-2020-8335

Lenovo » Thinkpad A275 Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_a275_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad A275 » Version: N/A
Lenovo » Thinkpad A475 Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_a475_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad A475 » Version: N/A
Lenovo » Thinkpad A285 Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_a285_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad A285 » Version: N/A
Lenovo » Thinkpad A485 Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_a485_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad A485 » Version: N/A
Lenovo » Thinkpad X395 Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_x395_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad X395 » Version: N/A
Lenovo » Thinkpad X1 Carbon (20bx) Firmware
Versions before (<) n14et54w
cpe:2.3:o:lenovo:thinkpad_x1_carbon_\(20bx\)_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad X1 Carbon (20bx) » Version: N/A
Lenovo » Thinkpad T495 Drift Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_t495_drift_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad T495 Drift » Version: N/A
Lenovo » Thinkpad T495s Jazz Firmware
Versions before (<) 2020-08-30
cpe:2.3:o:lenovo:thinkpad_t495s_jazz_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Lenovo » Thinkpad T495s Jazz » Version: N/A

Vulnerability Details : CVE-2020-8335

Exploit prediction scoring system (EPSS) score for CVE-2020-8335

CVSS scores for CVE-2020-8335

References for CVE-2020-8335

Products affected by CVE-2020-8335