Ubuntu 4.10 : cyrus21-imapd vulnerability (USN-37-1)

Critical Nessus Plugin ID 20653


The remote Ubuntu host is missing one or more security-related patches.


Recently another buffer overflow has been discovered in the SASL authentication module of the Cyrus IMAP server. An off-by-one comparison error in the mysasl_canon_user() function could lead to a missing termination of an user name string.

This vulnerability could allow remote, attacker-supplied machine code to be executed in the context of the affected server process. Since the IMAP server usually runs as unprivileged user 'cyrus', there is no possibility of root privilege escalation.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: Critical

ID: 20653

File Name: ubuntu_USN-37-1.nasl

Version: $Revision: 1.12 $

Type: local

Agent: unix

Published: 2006/01/15

Modified: 2016/05/25

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:cyrus21-admin, p-cpe:/a:canonical:ubuntu_linux:cyrus21-clients, p-cpe:/a:canonical:ubuntu_linux:cyrus21-common, p-cpe:/a:canonical:ubuntu_linux:cyrus21-dev, p-cpe:/a:canonical:ubuntu_linux:cyrus21-doc, p-cpe:/a:canonical:ubuntu_linux:cyrus21-imapd, p-cpe:/a:canonical:ubuntu_linux:cyrus21-murder, p-cpe:/a:canonical:ubuntu_linux:cyrus21-pop3d, p-cpe:/a:canonical:ubuntu_linux:libcyrus-imap-perl21, cpe:/o:canonical:ubuntu_linux:4.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2004/12/02

Reference Information

CVE: CVE-2004-1067

USN: 37-1