Amazon Linux AMI : exim (ALAS-2017-932)

High Nessus Plugin ID 105417

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

Use-after-free in receive_msg function via vectors involving BDAT commands

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands. (CVE-2017-16943)

Infinite loop and stack exhaustion in receive_msg function via vectors involving BDAT commands

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function. (CVE-2017-16944)

Solution

Run 'yum update exim' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-932.html

Plugin Details

Severity: High

ID: 105417

File Name: ala_ALAS-2017-932.nasl

Version: 3.3

Type: local

Agent: unix

Published: 2017/12/26

Modified: 2018/04/18

Dependencies: 12634

Risk Information

Risk Factor: High

CVSSv2

Base Score: 7.5

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

CVSSv3

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:amazon:linux:exim, p-cpe:/a:amazon:linux:exim-debuginfo, p-cpe:/a:amazon:linux:exim-greylist, p-cpe:/a:amazon:linux:exim-mon, p-cpe:/a:amazon:linux:exim-mysql, p-cpe:/a:amazon:linux:exim-pgsql, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 2017/12/20

Reference Information

CVE: CVE-2017-16943, CVE-2017-16944

ALAS: 2017-932