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

high Nessus Plugin ID 100641

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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: 6/7/2017

Updated: 4/10/2019

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS v3

Risk Factor: High

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-devel, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:libtirpc-debuginfo, p-cpe:/a:amazon:linux:libtirpc

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: 6/6/2017

Reference Information

CVE: CVE-2017-8779

ALAS: 2017-840