Debian DSA-4110-1 : exim4 - security update

critical Nessus Plugin ID 106728

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Synopsis

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

Description

Meh Chang discovered a buffer overflow flaw in a utility function used in the SMTP listener of Exim, a mail transport agent. A remote attacker can take advantage of this flaw to cause a denial of service, or potentially the execution of arbitrary code via a specially crafted message.

Solution

Upgrade the exim4 packages.

For the oldstable distribution (jessie), this problem has been fixed in version 4.84.2-2+deb8u5.

For the stable distribution (stretch), this problem has been fixed in version 4.89-2+deb9u3.

Plugin Details

Severity: Critical

ID: 106728

File Name: debian_DSA-4110.nasl

Version: 3.12

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/12/2018

Updated: 12/6/2022

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

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:exim4, cpe:/o:debian:debian_linux:8.0, 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: 2/10/2018

Vulnerability Publication Date: 2/8/2018

CISA Known Exploited Vulnerability Due Dates: 5/3/2022

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2018-6789

DSA: 4110

Detections

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