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

Critical 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: Critical

ID: 88756

File Name: ala_ALAS-2016-653.nasl

Version: 2.13

Type: local

Agent: unix

Published: 2016/02/17

Updated: 2019/04/11

Dependencies: 12634

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Temporal Score: 7.8

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

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

CVSS v3.0

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: CVSS:3.0/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: 2016/02/16

Reference Information

CVE: CVE-2015-7547

ALAS: 2016-653

IAVA: 2016-A-0053

TRA: TRA-2017-08