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Amazon Linux 2 : httpd (ALAS-2021-1674)

critical Nessus Plugin ID 151272

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of httpd installed on the remote host is prior to 2.4.48-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1674 advisory.

 A flaw was found in Apache httpd. The mod_proxy_wstunnel module tunnels non-upgraded connections.
 (CVE-2019-17567)

 A flaw was found in HTTPd. In some Apache HTTP Server versions, unprivileged local users can stop HTTPd on Windows. The highest threat from this vulnerability is to system availability. (CVE-2020-13938)

 A flaw was found In Apache httpd. The mod_proxy has a NULL pointer dereference. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
 (CVE-2020-13950)

 A flaw was found in Apache httpd. The mod_auth_digest has a single zero byte stack overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
 (CVE-2020-35452)

 A NULL pointer dereference was found in Apache httpd mod_session. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-26690)

 A heap overflow flaw was found In Apache httpd mod_session. The highest threat from this vulnerability is to system availability. (CVE-2021-26691)

 A flaw was found in Apache httpd. A possible regression from an earlier security fix broke behavior of MergeSlashes. The highest threat from this vulnerability is to data integrity. (CVE-2021-30641)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update httpd' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1674.html

https://access.redhat.com/security/cve/CVE-2019-17567

https://access.redhat.com/security/cve/CVE-2020-13938

https://access.redhat.com/security/cve/CVE-2020-13950

https://access.redhat.com/security/cve/CVE-2020-35452

https://access.redhat.com/security/cve/CVE-2021-26690

https://access.redhat.com/security/cve/CVE-2021-26691

https://access.redhat.com/security/cve/CVE-2021-30641

Plugin Details

Severity: Critical

ID: 151272

File Name: al2_ALAS-2021-1674.nasl

Version: 1.4

Type: local

Agent: unix

Published: 7/1/2021

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-26691

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:httpd-tools, p-cpe:/a:amazon:linux:mod_ldap, p-cpe:/a:amazon:linux:mod_proxy_html, p-cpe:/a:amazon:linux:mod_session, p-cpe:/a:amazon:linux:mod_ssl, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:httpd-devel, p-cpe:/a:amazon:linux:httpd-debuginfo, p-cpe:/a:amazon:linux:mod_md, p-cpe:/a:amazon:linux:httpd, p-cpe:/a:amazon:linux:httpd-manual, p-cpe:/a:amazon:linux:httpd-filesystem

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/1/2021

Vulnerability Publication Date: 6/1/2021

Reference Information

CVE: CVE-2019-17567, CVE-2020-13938, CVE-2020-13950, CVE-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641

ALAS: 2021-1674

IAVA: 2021-A-0259-S