6.8
MEDIUM
CVE-2020-8335
Lenovo ThinkPad BIOS Tamper Detection Bypass
Description

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.

INFO

Published Date :

Sept. 1, 2020, 10:15 p.m.

Last Modified :

Sept. 10, 2020, 2:56 p.m.

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

0.9
Public PoC/Exploit Available at Github

CVE-2020-8335 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-8335 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Lenovo thinkpad_a275_firmware
2 Lenovo thinkpad_a475_firmware
3 Lenovo thinkpad_a285_firmware
4 Lenovo thinkpad_a485_firmware
5 Lenovo thinkpad_x395_firmware
6 Lenovo thinkpad_x1_carbon_\(20bx\)_firmware
7 Lenovo thinkpad_t495_drift_firmware
8 Lenovo thinkpad_t495s_jazz_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-8335.

URL Resource
https://support.lenovo.com/us/en/product_security/LEN-30042 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

CVE Data Analysis, CVE Monitor, CVE EXP Prediction Based on Deep Learning. 1999-2020年存量CVE数据分析、监控CVE增量更新、基于深度学习的CVE EXP预测和自动化推送

Python

Updated: 2 months, 3 weeks ago
176 stars 24 fork 24 watcher
Born at : June 15, 2020, 2:56 p.m. This repo has been linked 692 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-8335 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-8335 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Sep. 10, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://support.lenovo.com/us/en/product_security/LEN-30042 No Types Assigned https://support.lenovo.com/us/en/product_security/LEN-30042 Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_a275_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_a275:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_a285_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_a285:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_a475_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_a475:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_a485_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_a485:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_t495_drift_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_t495_drift:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_t495s_jazz_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_t495s_jazz:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_x1_carbon_\(20bx\)_firmware:*:*:*:*:*:*:*:* versions up to (excluding) n14et54w OR cpe:2.3:h:lenovo:thinkpad_x1_carbon_\(20bx\):-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:lenovo:thinkpad_x395_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2020-08-30 OR cpe:2.3:h:lenovo:thinkpad_x395:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-8335 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-8335 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.07 }} 0.01%

score

0.28825

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability