Debian DSA-4687-1 : exim4 - security update

high Nessus Plugin ID 136676


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


It was discovered that exim4, a mail transport agent, suffers from a authentication bypass vulnerability in the spa authentication driver.
The spa authentication driver is not enabled by default.


Upgrade the exim4 packages.

For the oldstable distribution (stretch), this problem has been fixed in version 4.89-2+deb9u7.

For the stable distribution (buster), this problem has been fixed in version 4.92-8+deb10u4.

See Also

Plugin Details

Severity: High

ID: 136676

File Name: debian_DSA-4687.nasl

Version: 1.2

Type: local

Agent: unix

Published: 5/18/2020

Updated: 5/21/2020

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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


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:H/I:N/A:N

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:exim4, cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:9.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2020

Vulnerability Publication Date: 5/11/2020

Reference Information

CVE: CVE-2020-12783

DSA: 4687