Related Vulnerabilities: CVE-2021-3578  

A security issue was found in mbsync before version 1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.

Severity Medium

Remote Yes

Type Arbitrary code execution

Description

A security issue was found in mbsync before version 1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.

AVG-2042 isync 1.4.1-1 1.4.2-1 Medium Fixed

https://sourceforge.net/p/isync/mailman/message/37297759/
https://sourceforge.net/p/isync/isync/ci/589d2ed4283130108df5495b5510d822282e1300/