Ubuntu 17.04 / 17.10 : exim4 vulnerability (USN-3493-1)

high Nessus Plugin ID 104808
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VPR Score: 6.7

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

It was discovered that Exim incorrectly handled memory in the ESMTP CHUNKING extension. A remote attacker could use this issue to cause Exim to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected exim4-daemon-heavy and / or exim4-daemon-light packages.

See Also

https://usn.ubuntu.com/3493-1/

Plugin Details

Severity: High

ID: 104808

File Name: ubuntu_USN-3493-1.nasl

Version: 3.5

Type: local

Agent: unix

Published: 11/28/2017

Updated: 9/18/2019

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: High

VPR Score: 6.7

CVSS v2.0

Base Score: 7.5

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

CVSS v3.0

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-heavy, p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-light, cpe:/o:canonical:ubuntu_linux:17.04, cpe:/o:canonical:ubuntu_linux:17.10

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

Patch Publication Date: 11/27/2017

Vulnerability Publication Date: 11/25/2017

Reference Information

CVE: CVE-2017-16943

USN: 3493-1