CVEvulnerability
CVE-2021-3657
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2022-02-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-119
Description
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.
Affected configurations
• isync project isync (< 1.4.4)
• fedoraproject fedora 35
• redhat enterprise linux 7.0
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2028932 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-15 Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/12/03/1 Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2028932 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-15 Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/12/03/1 Mailing List, Third Party Advisory