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CVE-2021-3726— OS Command Injection in ohmyzsh/ohmyzsh

Quick assessment

Affected
ohmyzsh ohmyzsh/ohmyzsh
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.

ohmyzsh是一个开源的、社区驱动的框架，用于管理您的zsh配置。 ohmyzsh 存在操作系统命令注入漏洞，该漏洞源于"lib/termsupport.zsh"中定义的"title"函数使用"print"将终端标题设置为用户提供的字符串。

CVSS 7.5 · High EPSS 0.78% · P53

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-3726

Vulnerability Information
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Vulnerability Title
OS Command Injection in ohmyzsh/ohmyzsh
Source: CVE Program / CVE List V5
Vulnerability Description
# Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` uses `print` to set the terminal title to a user-supplied string. In Oh My Zsh, this function is always used securely, but custom user code could use the `title` function in a way that is unsafe. **Fixed in**: [a263cdac](https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac). **Impacted areas**: - `title` function in `lib/termsupport.zsh`. - Custom user code using the `title` function.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
ohmyzsh 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ohmyzsh是一个开源的、社区驱动的框架，用于管理您的zsh配置。 ohmyzsh 存在操作系统命令注入漏洞，该漏洞源于"lib/termsupport.zsh"中定义的"title"函数使用"print"将终端标题设置为用户提供的字符串。
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
ohmyzsh ohmyzsh/ohmyzsh unspecified ~ a263cdac -

II. Public POCs for CVE-2021-3726

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III. Intelligence Information for CVE-2021-3726

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Patches & Fixes for CVE-2021-3726 (1)

Same Patch Batch · ohmyzsh · 2021-11-30 · 4 CVEs total

CVE-2021-3725 7.5 HIGH OS Command Injection in ohmyzsh/ohmyzsh
CVE-2021-3727 7.5 HIGH OS Command Injection in ohmyzsh/ohmyzsh
CVE-2021-3769 7.5 HIGH OS Command Injection in ohmyzsh/ohmyzsh

IV. Related Vulnerabilities

Same product: ohmyzsh/ohmyzsh
Same vendor: ohmyzsh
Same weakness: CWE-78

V. Comments for CVE-2021-3726

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