Debian DSA-3828-1 : dovecot - security update

high Nessus Plugin ID 99292

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Synopsis

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

Description

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).

Solution

Upgrade the dovecot packages.

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

Plugin Details

Severity: High

ID: 99292

File Name: debian_DSA-3828.nasl

Version: 3.10

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 4/12/2017

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS v3

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

Detections

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