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Amazon Linux AMI : httpd24 (ALAS-2019-1166)

high Nessus Plugin ID 122758

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Synopsis

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

Description

In Apache HTTP server by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections. (CVE-2018-17189)

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service.
(CVE-2019-0190)

In Apache HTTP Server mod_session checks the session expiry time before decoding the session. This causes session expiry time to be ignored for mod_session_cookie sessions since the expiry time is loaded when the session is decoded. (CVE-2018-17199)

Solution

Run 'yum update httpd24' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2019-1166.html

Plugin Details

Severity: High

ID: 122758

File Name: ala_ALAS-2019-1166.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/12/2019

Updated: 2/5/2020

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2018-17199

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:H/A:N

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:mod24_md, p-cpe:/a:amazon:linux:mod24_ssl, p-cpe:/a:amazon:linux:httpd24-devel, p-cpe:/a:amazon:linux:httpd24-debuginfo, p-cpe:/a:amazon:linux:mod24_ldap, p-cpe:/a:amazon:linux:mod24_proxy_html, p-cpe:/a:amazon:linux:httpd24-tools, p-cpe:/a:amazon:linux:mod24_session, p-cpe:/a:amazon:linux:httpd24-manual, p-cpe:/a:amazon:linux:httpd24, 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: 3/25/2019

Vulnerability Publication Date: 1/30/2019

Reference Information

CVE: CVE-2018-17189, CVE-2018-17199, CVE-2019-0190

ALAS: 2019-1166