CVE-2021-3727 : Vulnerability Insights and Analysis

A vulnerability has been identified in the

rand-quote

and

hitokoto

plugins of the

ohmyzsh/ohmyzsh

project, potentially leading to OS command injection due to improper handling of quotes sourced from external APIs. This vulnerability has a CVSS base score of 7.5 (High severity).

Understanding CVE-2021-3727

This CVE pertains to an OS command injection vulnerability in the

ohmyzsh/ohmyzsh

project's

rand-quote

and

hitokoto

plugins.

What is CVE-2021-3727?

The vulnerability arises from the processes involved in fetching and printing quotes from external APIs within the affected plugins. Exploiting this flaw could enable an attacker to trigger command injection by crafting malicious quotes.

The Impact of CVE-2021-3727

With a CVSS base score of 7.5, this vulnerability has a high impact on confidentiality, integrity, and availability. Attackers could potentially execute arbitrary commands on the target system.

Technical Details of CVE-2021-3727

This section delves into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows for command injection through specially crafted quotes sourced from quotationspage.com and hitokoto.cn within the

rand-quote

and

hitokoto

plugins.

Affected Systems and Versions

The vulnerability affects all versions of

ohmyzsh/ohmyzsh

prior to version

72928432

.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting commands into quotes retrieved from external APIs and printed using the affected plugins.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-3727, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Users should update to version

72928432

or newer to patch the vulnerability. Additionally, avoid executing commands from untrusted sources.

Long-Term Security Practices

Implement strict input validation mechanisms, restrict command execution permissions, and regularly update software to prevent similar vulnerabilities.

Patching and Updates

Ensure timely installation of patches and updates released by the

ohmyzsh/ohmyzsh

project to address security vulnerabilities.