Debian DSA-3828-1 : dovecot - security update

high Nessus Plugin ID 99292


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


It was discovered that the Dovecot email server is vulnerable to a denial of service attack. When the 'dict' passdb and userdb are used for user authentication, the username sent by the IMAP/POP3 client is sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart).


Upgrade the dovecot packages.

For the stable distribution (jessie), this problem has been fixed in version 1:2.2.13-12~deb8u2.

See Also

Plugin Details

Severity: High

ID: 99292

File Name: debian_DSA-3828.nasl

Version: 3.10

Type: local

Agent: unix

Published: 4/12/2017

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: 5

Temporal Score: 3.7

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


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:dovecot, cpe:/o:debian:debian_linux:8.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/10/2017

Reference Information

CVE: CVE-2017-2669

DSA: 3828