Executive Summary

The vulnerability in willitmerge versions 0.2.1 and prior is a command injection flaw. It occurs because the tool uses an insecure method (exec) to run child processes, concatenating user input directly into commands. This allows an attacker to inject and execute arbitrary commands via command-line flags or through user-controlled input in the target repository.

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Impact Analysis

This vulnerability can allow an attacker to execute arbitrary commands on the system running willitmerge without any privileges or user interaction. This could lead to unauthorized access, data compromise, system manipulation, or disruption of services.

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Mitigation Strategies

Since no known fix is public at the time of publication, immediate mitigation steps include avoiding use of willitmerge versions 0.2.1 and prior, especially in environments where untrusted input can be passed to the tool. Additionally, restrict access to the tool and monitor for suspicious activity related to its execution. Consider isolating or sandboxing the tool to limit potential impact.

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