How severe is CVE-2021-3578?

This vulnerability has a severity rating of HIGH with a CVSS score of 7.8 out of 10.

What type of vulnerability is CVE-2021-3578?

This is classified as CWE-704, which is a common weakness in software security.

CVE-2021-3578 - HIGH Severity | CVSS 7.8

Vulnerability Description

A flaw was found in mbsync before v1.3.6 and v1.4.2, 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.

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