Amazon Linux AMI : libtirpc (ALAS-2017-840)

High Nessus Plugin ID 100641

Synopsis

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

Description

Memory leak when failing to parse XDR strings or bytearrays

It was found that due to the way rpcbind uses libtirpc (libntirpc), a memory leak can occur when parsing specially crafted XDR messages. An attacker sending thousands of messages to rpcbind could cause its memory usage to grow without bound, eventually causing it to be terminated by the OOM killer. (CVE-2017-8779)

Solution

Run 'yum update libtirpc' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-840.html

Plugin Details

Severity: High

ID: 100641

File Name: ala_ALAS-2017-840.nasl

Version: 3.4

Type: local

Agent: unix

Published: 2017/06/07

Updated: 2019/04/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 6.1

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libtirpc, p-cpe:/a:amazon:linux:libtirpc-debuginfo, p-cpe:/a:amazon:linux:libtirpc-devel, 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: 2017/06/06

Reference Information

CVE: CVE-2017-8779

ALAS: 2017-840