CVE-2021-33582
HIGHCyrus IMAP < 3.0.16 - Denial of Service via Hash Table Collision
Title source: llmDescription
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.
References (7)
Core 7
Core References
Patch, Release Notes, Vendor Advisory x_refsource_misc
https://www.cyrusimap.org/imap/download/release-notes/index.html
Not Applicable, Third Party Advisory x_refsource_misc
https://github.com/cyrusimap/cyrus-imapd/security/advisories
Patch, Third Party Advisory x_refsource_misc
https://github.com/cyrusimap/cyrus-imapd/commits/master
Patch, Vendor Advisory x_refsource_confirm
https://cyrus.topicbox.com/groups/announce/T3dde0a2352462975-M1386fc44adf967e072f8df13/cyrus-imap-3-4-2-3-2-8-and-3-0-16-released
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM/
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/06/msg00013.html
Scores
CVSS v3
7.5
EPSS
0.0285
EPSS Percentile
84.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-407
Status
published
Products (4)
cyrus/imap
< 3.0.16
debian/debian_linux
9.0
fedoraproject/fedora
34
fedoraproject/fedora
35
Published
Sep 01, 2021
Tracked Since
Feb 18, 2026