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E42 80 Firmware CVE-2020-8323

MEDIUM
2020-06-09 psirt@lenovo.com
RCE Lenovo E42 80 Firmware E52 80 Firmware Miix 720 12Ikb Firmware Thinkpad L380 Firmware Thinkpad E480 Firmware Thinkpad E580 Firmware Thinkpad L480 Firmware Thinkpad L580 Firmware Thinkpad P51 Firmware Thinkpad P51S Firmware Thinkpad P52 Firmware Thinkpad P52S Firmware Thinkpad P71 Firmware Thinkpad P72 Firmware Thinkpad T25 Firmware Thinkpad T470 Firmware Thinkpad T470P Firmware Thinkpad T470S Firmware Thinkpad T480 Firmware Thinkpad T480S Firmware Thinkpad T570 Firmware Thinkpad T580 Firmware Thinkpad X380 Yoga Firmware Thinkpad Yoga 370 Firmware Thinkpad S1 Firmware Thinkpad X1 Carbon Firmware Thinkpad X1 Tablet Firmware Thinkpad X1 Yoga Firmware Thinkpad X270 Firmware Thinkpad X280 Firmware Thinkpad Helix Firmware Thinkpad T440 Firmware Thinkpad T440S Firmware Thinkpad T440P Firmware Thinkpad T460S Firmware Thinkpad T540 Firmware Thinkpad T540P Firmware Thinkpad T550 Firmware Thinkpad T560 Firmware Thinkpad W540 Firmware Thinkpad W541 Firmware Thinkpad W550S Firmware Thinkpad X240S Firmware Thinkpad X240 Firmware Thinkpad X250 Firmware Thinkpad S5 Firmware Thinkpad E560P Firmware Thinkpad T460 Firmware Thinkpad T460P Firmware Thinkpad X260 Firmware 720S Touch 15Ikb Firmware 720S 15Ikb Firmware E53 80 Firmware V330 15Ikb Firmware V330 15Isk Firmware V730 15Ikb Firmware Thinkpad 11E Firmware Thinkpad 13 Firmware Thinkpad A275 Firmware Thinkpad A475 Firmware Thinkpad E460 Firmware Thinkpad E560 Firmware Thinkpad E465 Firmware Thinkpad E565 Firmware Thinkpad E470 Firmware Thinkpad E570 Firmware Thinkpad E475 Firmware Thinkpad E575 Firmware Thinkpad E485 Firmware Thinkpad E585 Firmware Thinkpad L380 Yoga Firmware Thinkpad L460 Firmware Thinkpad L470 Firmware Thinkpad L560 Firmware Thinkpad L570 Firmware Thinkpad P50 Firmware Thinkpad P50S Firmware Thinkpad P70 Firmware Thinkpad Yoga 260 Firmware Thinkpad S1 3Rd Firmware V330 15Igm Firmware 730S 13Iwl Firmware S940 14Iwl Firmware V110 14Ikb Firmware V130 15Ikb Firmware Wei5 15Ikb Firmware Yoga S730 13Iwl Firmware Yoga S940 14Iwl Firmware Thinkpad E490S Firmware Thinkpad S3 Firmware Thinkpad E490 Firmware Thinkpad E590 Firmware Thinkpad R490 Firmware Thinkpad R590 Firmware Thinkpad S3 3Rd Gen Firmware Thinkpad S2 Yoga 3Rd Gen Firmware Thinkpad L390 Yoga Firmware Thinkpad S2 Yoga 4Th Gen Firmware Thinkpad L490 Firmware Thinkpad L590 Firmware Thinkpad P1 Firmware Thinkpad P53 Firmware Thinkpad P53S Firmware Thinkpad P73 Firmware Thinkpad S1 Yoga Firmware Thinkpad S5 Yoga 15 Firmware Thinkpad S540 Firmware Thinkpad T490 Firmware Thinkpad T490S Firmware Thinkpad T590 Firmware Thinkpad X1 Extreme Firmware Thinkpad X140E Firmware Thinkpad X390 Firmware Thinkpad X390 Yoga Firmware Thinkpad 11E Yoga Gen 6 Firmware Thinkpad Yoga 11E 3Rd Gen Firmware Thinkpad Yoga 11E 4Th Gen Firmware Thinkpad Yoga 11E 5Th Gen Firmware Thinkpad 13 2Nd Gen Firmware Thinkpad A285 Firmware Thinkpad A485 Firmware Thinkpad E14 Firmware Thinkpad E15 Firmware Thinkpad R14 Firmware Thinkpad S3 Gen 2 Firmware Thinkpad E455 Firmware Thinkpad E555 Firmware Thinkpad L13 Firmware Thinkpad L1415 Firmware Thinkpad P43S Firmware Thinkpad S5 2Nd Gen Firmware Thinkpad X395 Firmware Thinkpad T495 Firmware Thinkpad T495S Firmware 330 14Ast Firmware 330 15Ast Firmware 330 17Ast Firmware 340C 15Api Firmware 340C 15Ast Firmware C640 Iml Firmware K22 80 Firmware V720 12 Firmware K32 80 Kbl Firmware K32 80 Skl Firmware S145 14Api Firmware S145 14Ast Firmware S145 15Api Firmware S145 15Ast Firmware S540 13Api Firmware S750 Iil Firmware Thinkbook 13S Iwl Firmware Thinkbook 14S Iwl Firmware V110 14Ast Firmware V110 15Ast Firmware V130 15Igm Firmware V310 15Igm Firmware V340 Iil Firmware V340 Iml Firmware V540S 13 Firmware 14Iwl Firmware V730 13Ikb Firmware V730 13Isk Firmware Xiaoxin 14 Ast Qc 2019 Firmware Xx 14Api Qc 2019 Firmware 6 Pro 13 Iwl Firmware 6 Pro 14 Iwl Firmware K3 Firmware K4 Iwl Firmware Thinkpad S1 Yoga Vpro Firmware Thinkpad X1 Carbon 20Ax Firmware Thinkpad X1 Carbon 20Bx Firmware Thinkpad Yoga 11E 20Dx Firmware
6.7
CVSS 3.1 · NVD
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Vulnerability Assessment

Impact

CVSS score of 6.7 (MEDIUM). Attack characteristics: local attack vector, low complexity, high privileges required, no user interaction not required.

Exploit ScenarioDerived

Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

A potential vulnerability in the SMI callback function used in the Legacy SD driver in some Lenovo ThinkPad, ThinkStation, and Lenovo Notebook models may allow arbitrary code execution. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A potential vulnerability in the SMI callback function used in the Legacy SD driver in some Lenovo ThinkPad, ThinkStation, and Lenovo Notebook models may allow arbitrary code execution. Affected products include: Lenovo 330-14Ast Firmware, Lenovo 330-15Ast Firmware, Lenovo 330-17Ast Firmware, Lenovo 340C-15Api Firmware, Lenovo 340C-15Ast Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.7 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

A potential vulnerability in the SMI callback function used in the Legacy SD driver in some Lenovo ThinkPad, ThinkStation, and Lenovo Notebook models may allow arbitrary code execution.

Threat Intelligence Overview

EPSS Score
0.3%
Top 77% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:lenovo:330-14ast_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:330-15ast_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:330-17ast_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:340c-15api_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:340c-15ast_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:720s_touch-15ikb_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:720s-15ikb_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:730s-13iwl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:c640-iml_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:e42-80_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:e52-80_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:k22-80_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:v720-12_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:k32-80_kbl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:k32-80_skl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:miix_720-12ikb_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s145-14api_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s145-14ast_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s145-15api_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:s145-15ast_firmware:-:*:*:*:*:*:*:*
+ 153 more

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