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CVE-2021-34426— Arbitrary command execution in Keybase Client for Windows

Quick assessment

Affected
Zoom Video Communications Inc Keybase Client for Windows
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keybase是一套基于PGP技术的、支持端到端加密的社交网络平台。 Keybase 5.6.0 版本之前的 Windows 版客户端中存在安全漏洞，对用户的 Git 存储库具有写入权限的恶意行为者可以利用此漏洞在用户的本地系统上执行任意 Windows 命令。

CVSS 5.3 · Medium EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1059.004 · Unix Shell
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I. Basic Information for CVE-2021-34426

Vulnerability Information
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Vulnerability Title
Arbitrary command execution in Keybase Client for Windows
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the "keybase git lfs-config" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\'s local system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Keybase 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keybase是一套基于PGP技术的、支持端到端加密的社交网络平台。 Keybase 5.6.0 版本之前的 Windows 版客户端中存在安全漏洞，对用户的 Git 存储库具有写入权限的恶意行为者可以利用此漏洞在用户的本地系统上执行任意 Windows 命令。
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
Zoom Video Communications Inc Keybase Client for Windows unspecified ~ 5.6.0 -

II. Public POCs for CVE-2021-34426

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III. Intelligence Information for CVE-2021-34426

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Other References for CVE-2021-34426 (1)

IV. Related Vulnerabilities

Same product: Keybase Client for Windows
Same vendor: Zoom Video Communications Inc

V. Comments for CVE-2021-34426

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