Debian DSA-3888-1 : exim4 - security update (Stack Clash)

medium Nessus Plugin ID 100879

Synopsis

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

Description

The Qualys Research Labs discovered a memory leak in the Exim mail transport agent. This is not a security vulnerability in Exim by itself, but can be used to exploit a vulnerability in stack handling.
For the full details, please refer to their advisory published at:
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

Solution

Upgrade the exim4 packages.

For the oldstable distribution (jessie), this problem has been fixed in version 4.84.2-2+deb8u4.

For the stable distribution (stretch), this problem has been fixed in version 4.89-2+deb9u1.

See Also

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

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

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

https://www.debian.org/security/2017/dsa-3888

Plugin Details

Severity: Medium

ID: 100879

File Name: debian_DSA-3888.nasl

Version: 3.12

Type: local

Agent: unix

Published: 6/20/2017

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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

CVSS v3

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.5

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

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

Vulnerability Information

CPE: cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*, p-cpe:2.3:a:debian:debian_linux:exim4:*:*:*:*:*:*:*

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2017

Reference Information

CVE: CVE-2017-1000369

DSA: 3888