CVEvulnerability
CVE-2021-33582
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-09-01
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-407
Description
Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service (multiple-minute daemon hang) via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16.
Affected configurations
• cyrus imap (< 3.0.16)
• cyrus imap (>= 3.2.0 < 3.2.8)
• cyrus imap (>= 3.4.0 < 3.4.2)
• fedoraproject fedora 34
• fedoraproject fedora 35
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-407 Inefficient Algorithmic Complexity weakness
References
- https://cyrus.topicbox.com/groups/announce/T3dde0a2352462975-M1386fc44adf967e072f8df13/cyrus-imap-3-4-2-3-2-8-and-3-0-16-released Patch, Vendor Advisory
- https://github.com/cyrusimap/cyrus-imapd/commits/master Patch, Third Party Advisory
- https://github.com/cyrusimap/cyrus-imapd/security/advisories Not Applicable, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00013.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS/ lists.fedoraproject.org
- https://www.cyrusimap.org/imap/download/release-notes/index.html Patch, Release Notes, Vendor Advisory
- https://cyrus.topicbox.com/groups/announce/T3dde0a2352462975-M1386fc44adf967e072f8df13/cyrus-imap-3-4-2-3-2-8-and-3-0-16-released Patch, Vendor Advisory
- https://github.com/cyrusimap/cyrus-imapd/commits/master Patch, Third Party Advisory
- https://github.com/cyrusimap/cyrus-imapd/security/advisories Not Applicable, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00013.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS/ lists.fedoraproject.org
- https://www.cyrusimap.org/imap/download/release-notes/index.html Patch, Release Notes, Vendor Advisory