Advisory Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mintty. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of sixel images. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user.

Fixed in Version 3.7.5
https://github.com/mintty/mintty/commit/c78ee1085f438333d5be4e3688e5d6b890c146c4

• 2024-08-30 - Vulnerability reported to vendor
• 2025-02-05 - Coordinated public release of advisory
• 2025-02-05 - Advisory Updated