Debian DSA-4745-1 : dovecot - security update

high Nessus Plugin ID 139553

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Synopsis

The remote Debian host is missing a security-related 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.

Solution

Upgrade the dovecot packages.

For the stable distribution (buster), these problems have been fixed in version 1:2.3.4.1-5+deb10u3.

Plugin Details

Severity: High

ID: 139553

File Name: debian_DSA-4745.nasl

Version: 1.4

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/13/2020

Updated: 2/26/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, 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: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:dovecot

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: 8/12/2020

Vulnerability Publication Date: 8/12/2020

Reference Information

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

DSA: 4745

Detections

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