Mitigation Strategies

Upgrade mintty to version 3.7.5 or later, as this version fixes the vulnerability.

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Executive Summary

This vulnerability in Mintty (versions 2.3.6 through 3.7.4) involves certain escape sequences that, when printed in bash, cause the mintty process to access a file at a specific path. An attacker can exploit this by specifying an arbitrary network path, which leads to the victim's machine negotiating an NTLM hash with a remote host controlled by the attacker. This allows the attacker to capture authentication hashes.

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Impact Analysis

The vulnerability can lead to the exposure of NTLM authentication hashes from the victim's machine to an attacker-controlled remote host. The attacker can then use password cracking tools or perform Pass the Hash attacks using the captured NetNTLMv2 hashes, potentially gaining unauthorized access to systems or resources.

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