CVE-2021-3657
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-3657
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3657.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-3657
- Downstream
- Related
- Published
- 2022-02-18T18:15:09Z
- Modified
- 2025-08-09T20:01:26Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution.
- References