Debian DLA-2328-1 : dovecot security update

high Nessus Plugin ID 139626

Synopsis

The remote Debian host is missing a security update.

Description

Several vulnerabilities have been discovered in the Dovecot email server.

CVE-2020-12100

Receiving mail with deeply nested MIME parts leads to resource exhaustion as Dovecot attempts to parse it.

CVE-2020-12673

Dovecot's NTLM implementation does not correctly check message buffer size, which leads to a crash when reading past allocation.

CVE-2020-12674

Dovecot's RPA mechanism implementation accepts zero-length message, which leads to assert-crash later on.

For Debian 9 stretch, these problems have been fixed in version 1:2.2.27-3+deb9u6.

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/dovecot

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

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html

https://packages.debian.org/source/stretch/dovecot

https://security-tracker.debian.org/tracker/source-package/dovecot

Plugin Details

Severity: High

ID: 139626

File Name: debian_DLA-2328.nasl

Version: 1.3

Type: local

Agent: unix

Published: 8/18/2020

Updated: 2/26/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2020-12674

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:dovecot-core, p-cpe:/a:debian:debian_linux:dovecot-dbg, p-cpe:/a:debian:debian_linux:dovecot-dev, p-cpe:/a:debian:debian_linux:dovecot-gssapi, p-cpe:/a:debian:debian_linux:dovecot-imapd, p-cpe:/a:debian:debian_linux:dovecot-ldap, p-cpe:/a:debian:debian_linux:dovecot-lmtpd, p-cpe:/a:debian:debian_linux:dovecot-lucene, p-cpe:/a:debian:debian_linux:dovecot-managesieved, p-cpe:/a:debian:debian_linux:dovecot-mysql, p-cpe:/a:debian:debian_linux:dovecot-pgsql, p-cpe:/a:debian:debian_linux:dovecot-pop3d, p-cpe:/a:debian:debian_linux:dovecot-sieve, p-cpe:/a:debian:debian_linux:dovecot-solr, p-cpe:/a:debian:debian_linux:dovecot-sqlite, cpe:/o:debian:debian_linux:9.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/15/2020

Vulnerability Publication Date: 8/12/2020

Reference Information

CVE: CVE-2020-12100, CVE-2020-12673, CVE-2020-12674