Debian DSA-4110-1 : exim4 - security update

High Nessus Plugin ID 106728

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VPR Score: 9.5

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.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890000

https://security-tracker.debian.org/tracker/source-package/exim4

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

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

https://www.debian.org/security/2018/dsa-4110

Plugin Details

Severity: High

ID: 106728

File Name: debian_DSA-4110.nasl

Version: 3.8

Type: local

Agent: unix

Published: 2018/02/12

Updated: 2019/04/30

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 9.5

CVSS v2.0

Base Score: 7.5

Temporal Score: 6.2

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

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3.0

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: 2018/02/10

Vulnerability Publication Date: 2018/02/08

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2018-6789

DSA: 4110