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CVE-2021-33582

Published: 1 September 2021

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
cyrus-imapd
Launchpad, Ubuntu, Debian
bionic Needed

focal Needed

jammy Not vulnerable

mantic Not vulnerable

noble Not vulnerable

trusty Does not exist

upstream
Released (3.4.2, 3.2.8, 3.0.16)
xenial Ignored
(end of standard support)
Patches:
upstream: https://github.com/cyrusimap/cyrus-imapd/commit/eba721a28dc8e521240d2e501a4142a7fab77119
upstream: https://github.com/cyrusimap/cyrus-imapd/commit/bfb966ee8897305451ea978fd963ef89e3047369
upstream: https://github.com/cyrusimap/cyrus-imapd/commit/aca2af0f2a3382b8afc2fa8ebd7557fdeb61d131



cyrus-imapd-2.4
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream
Released (3.4.2, 3.2.8, 1.0.16)
xenial Needed

Patches:



upstream: https://github.com/cyrusimap/cyrus-imapd/commit/eba721a28dc8e521240d2e501a4142a7fab77119
upstream: https://github.com/cyrusimap/cyrus-imapd/commit/bfb966ee8897305451ea978fd963ef89e3047369
upstream: https://github.com/cyrusimap/cyrus-imapd/commit/aca2af0f2a3382b8afc2fa8ebd7557fdeb61d131

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H