Amazon Linux AMI : nghttp2 (ALAS-2019-1298) (Data Dribble) (Resource Loop)

high Nessus Plugin ID 129568

Synopsis

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

Description

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both. (CVE-2019-9511)

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree.
This can consume excess CPU. (CVE-2019-9513)

Solution

Run 'yum update nghttp2' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2019-1298.html

Plugin Details

Severity: High

ID: 129568

File Name: ala_ALAS-2019-1298.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/4/2019

Updated: 12/23/2019

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libnghttp2, p-cpe:/a:amazon:linux:libnghttp2-devel, p-cpe:/a:amazon:linux:nghttp2, p-cpe:/a:amazon:linux:nghttp2-debuginfo, cpe:/o:amazon:linux

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/2/2019

Vulnerability Publication Date: 8/13/2019

Reference Information

CVE: CVE-2019-9511, CVE-2019-9513

ALAS: 2019-1298