Amazon Linux AMI : glibc (ALAS-2016-653)

high Nessus Plugin ID 88756

Synopsis

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

Description

A stack-based buffer overflow flaw was found in the send_dg() and send_vc() functions, used by getaddrinfo() and other higher-level interfaces of glibc. A remote attacker able to cause an application to call either of these functions could use this flaw to execute arbitrary code with the permissions of the user running the application.

Solution

Run 'yum update glibc' to update your system. Note that you may need to run 'yum clean all' first. Once this update has been applied, 'reboot your instance to ensure that all processes and daemons that link against glibc are using the updated version'. On new instance launches prior to Amazon Linux AMI 2015.09.2, you should still reboot after cloud-init has automatically applied this update.

See Also

https://aws.amazon.com/amazon-linux-ami/faqs/#auto_update

https://alas.aws.amazon.com/ALAS-2016-653.html

https://www.tenable.com/security/research/tra-2017-08

Plugin Details

Severity: High

ID: 88756

File Name: ala_ALAS-2016-653.nasl

Version: 2.13

Type: local

Agent: unix

Published: 2/17/2016

Updated: 4/11/2019

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

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:glibc, p-cpe:/a:amazon:linux:glibc-common, p-cpe:/a:amazon:linux:glibc-debuginfo, p-cpe:/a:amazon:linux:glibc-debuginfo-common, p-cpe:/a:amazon:linux:glibc-devel, p-cpe:/a:amazon:linux:glibc-headers, p-cpe:/a:amazon:linux:glibc-static, p-cpe:/a:amazon:linux:glibc-utils, p-cpe:/a:amazon:linux:nscd, cpe:/o:amazon:linux

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/16/2016

Reference Information

CVE: CVE-2015-7547

ALAS: 2016-653

IAVA: 2016-A-0053

TRA: TRA-2017-08