CVE-2020-8341
No known exploitation. EPSS puts it in the 26th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 26th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
4 events over 1542 days, from the signal feeds we watch.
- Patch availablerecord updated
- Publishedweakness classified
Affected products
- thinkpad t490 \(20nx\) firmwareHardware Firmware
- thinkpad t490 \(20qx\) firmwareHardware Firmware
- thinkpad t490 \(20rx\) firmwareHardware Firmware
- thinkpad t490s \(20nx\) firmwareHardware Firmware
- thinkpad t495 drift firmwareHardware Firmware
- thinkpad t590 \(20nx\) firmwareHardware Firmware
- thinkpad x1 carbon \(20qx\) firmwareHardware Firmware
- thinkpad x1 yoga \(20qx\) firmwareHardware Firmware
And 3 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Scored 2.4 by NVD.
How it is reached
- Attack Vector PhysicalRequires physical access to the device
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
Sources
References in the record
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