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Lenovo Thinkpad T490 \(20nx\) FirmwareIn Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this prov…

Risk 14
Severity
2.4
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.

Remedy

No action required. Lenovo has updated BIOS for systems in the product impact section to implement this secondary protection, PRx.
First published (updated )
CVE-2020-8341

Lenovo Thinkpad A275 FirmwareThe BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r…

Risk 62
Severity
6.8
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Remedy

Update BIOS to the following BIOS versions (or later): Lenovo ThinkPad A285: r0xuj70w ; A485: r0wuj65w ; T495: r12uj55w ; T495s/X395: r13uj47w
First published (updated )
CVE-2020-8335

Lenovo Thinkpad T495s FirmwareThe BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad T495s, X395, T495, A485, A2…

Risk 62
Severity
6.8
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad T495s, X395, T495, A485, A285, A475, A275 which may allow for unauthorized access.

Remedy

Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-30042.
First published (updated )
CVE-2020-8334

Lenovo Thinkpad 11e Yoga Gen 6 FirmwareAn internal shell was included in BIOS image in some ThinkPad models that could allow escalation of …

Risk 62
Severity
6.8
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

An internal shell was included in BIOS image in some ThinkPad models that could allow escalation of privilege.

Remedy

Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-30042.
First published (updated )
CVE-2020-8320

Lenovo Power Management DriverBuffer Overflow

Risk 26
Severity
4.4
Buffer Overflow
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

A potential vulnerability has been reported in Lenovo Power Management Driver versions prior to 1.67.17.48 leading to a buffer overflow which could cause a denial of service.

Remedy

Update to Lenovo Power Management driver version 1.67.17.48 or higher.
First published (updated )
CVE-2019-6192

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