==========================================================================
Ubuntu Security Notice USN-7224-1
January 22, 2025

cyrus-imapd vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Cyrus IMAP Server.

Software Description:
- cyrus-imapd: An IMAP server

Details:

It was discovered that non-authentication-related HTTP requests could be
interpreted in an authentication context by a Cyrus IMAP Server when
multiple requests arrived over the same connection. An unauthenticated
attacker could possibly use this issue to perform a privilege escalation
attack. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-18928)

Matthew Horsfall discovered that Cyrus IMAP Server utilized a poor string
hashing algorithm that could be abused to control where data was being
stored. An attacker could possibly use this issue to perform a denial of
service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
(CVE-2021-33582)

Damian Poddebniak discovered that Cyrus IMAP Server could interpret
specially crafted commands to exploit a memory issue. An authenticated
attacker could possibly use this issue to perform a denial of service.
This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS.
(CVE-2024-34055)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
cyrus-admin 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-caldav 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-clients 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-common 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-dev 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-imapd 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-murder 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-nntpd 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-pop3d 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-replication 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro
libcyrus-imap-perl 3.8.2-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 22.04 LTS
cyrus-admin 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-caldav 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-clients 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-common 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-dev 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-imapd 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-murder 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-nntpd 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-pop3d 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
cyrus-replication 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro
libcyrus-imap-perl 3.4.3-3ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 20.04 LTS
cyrus-caldav 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-clients 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-common 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-dev 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-imapd 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-murder 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-nntpd 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-pop3d 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
cyrus-replication 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro
libcyrus-imap-perl 3.0.13-5ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
cyrus-caldav 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-clients 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-common 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-dev 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-imapd 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-murder 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-nntpd 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-pop3d 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
cyrus-replication 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro
libcyrus-imap-perl 2.5.10-3ubuntu1.1+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7224-1
CVE-2019-18928, CVE-2021-33582, CVE-2024-34055