CVE-2021-3578
7.8
HIGH
CVSS 3.1
EPSS 0.85%
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.
How to fix CVE-2021-3578
To remediate CVE-2021-3578, upgrade the affected package to a fixed version below.
- Debian/isync—upgrade to 1.3.0-2.2 or later
Is CVE-2021-3578 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.3.0-2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |