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.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade isync | Aug 22, 2024 | Feb 18, 2022 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Feb 18, 2022 |
| Debian | — | Upgrade isync | Jul 4, 2022 | Feb 18, 2022 |
| Gentoo Linux | — | Upgrade net-mail/isync. | Aug 11, 2022 | Feb 18, 2022 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Feb 18, 2022 |
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