Debian DSA-4488-1 : exim4 - security update

critical Nessus Plugin ID 127077

Synopsis

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

Description

Jeremy Harris discovered that Exim, a mail transport agent, does not properly handle the ${sort } expansion. This flaw can be exploited by a remote attacker to execute programs with root privileges in non-default (and unusual) configurations where ${sort } expansion is used for items that can be controlled by an attacker.

Solution

Upgrade the exim4 packages.

For the oldstable distribution (stretch), this problem has been fixed in version 4.89-2+deb9u5.

For the stable distribution (buster), this problem has been fixed in version 4.92-8+deb10u1.

See Also

https://packages.debian.org/source/stretch/exim4

https://packages.debian.org/source/buster/exim4

https://www.debian.org/security/2019/dsa-4488

Plugin Details

Severity: Critical

ID: 127077

File Name: debian_DSA-4488.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/26/2019

Updated: 1/6/2020

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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: 7/25/2019

Vulnerability Publication Date: 7/25/2019

Reference Information

CVE: CVE-2019-13917

DSA: 4488