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CVE-2020-8321

Quick assessment

Affected
Lenovo BIOS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lenovo System Lock Preinstallation driver是中国联想（Lenovo）公司的一款系统锁定预安装（SLP）驱动程序。 Lenovo System Lock Preinstallation driver（Notebook和ThinkStation系列）中的SMI回调函数存在安全漏洞。攻击者可利用该漏洞执行任意代码。

CVSS 6.4 · Medium EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-8321

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A potential vulnerability in the SMI callback function used in the System Lock Preinstallation driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Lenovo System Lock Preinstallation driver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lenovo System Lock Preinstallation driver是中国联想（Lenovo）公司的一款系统锁定预安装（SLP）驱动程序。 Lenovo System Lock Preinstallation driver（Notebook和ThinkStation系列）中的SMI回调函数存在安全漏洞。攻击者可利用该漏洞执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Lenovo BIOS various -

II. Public POCs for CVE-2020-8321

# POC Description Source Link Shenlong Link
1 None https://github.com/SatheeshGitHub575/external_curl_CVE-2020-8321 POC Details
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III. Intelligence Information for CVE-2020-8321

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Vendor Advisories for CVE-2020-8321 (1)

Same Patch Batch · Lenovo · 2020-06-09 · 9 CVEs total

CVE-2019-6173 6.7 MEDIUM Lenovo安装包代码问题漏洞
CVE-2019-6196 6.7 MEDIUM Lenovo安装包代码问题漏洞
CVE-2020-8320 6.4 MEDIUM 多款Lenovo ThinkPad产品安全漏洞
CVE-2020-8322 6.4 MEDIUM Lenovo Legacy USB 安全漏洞
CVE-2020-8323 6.4 MEDIUM Lenovo Legacy SD driver 安全漏洞
CVE-2020-8336 6.4 MEDIUM 多款Lenovo ThinkPad产品安全漏洞
CVE-2020-8334 6.1 MEDIUM 多款Lenovo产品安全漏洞
CVE-2020-8337 Synaptics Smart Audio UWP app 代码问题漏洞

IV. Related Vulnerabilities

Same product: BIOS
Same vendor: Lenovo

V. Comments for CVE-2020-8321

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