Debian DSA-2377-1 : cyrus-imapd-2.2 - NULL pointer dereference

medium Nessus Plugin ID 57517


The remote Debian host is missing a security-related update.


It was discovered that cyrus-imapd, a highly scalable mail system designed for use in enterprise environments, is not properly parsing mail headers when a client makes use of the IMAP threading feature. As a result, a NULL pointer is dereferenced which crashes the daemon. An attacker can trigger this by sending a mail containing crafted reference headers and access the mail with a client that uses the server threading feature of IMAP.


Upgrade the cyrus-imapd-2.2 packages.

For the oldstable distribution (lenny), this problem has been fixed in version 2.2.13-14+lenny6.

For the stable distribution (squeeze), this problem has been fixed in version 2.2.13-19+squeeze3.

See Also

Plugin Details

Severity: Medium

ID: 57517

File Name: debian_DSA-2377.nasl

Version: 1.8

Type: local

Agent: unix

Published: 1/12/2012

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:cyrus-imapd-2.2, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/1/2012

Reference Information

CVE: CVE-2011-3481

BID: 49659

DSA: 2377