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Amazon Linux 2023 : sendmail, sendmail-cf, sendmail-milter (ALAS2023-2023-018)

high Nessus Plugin ID 173174

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2023-018 advisory.

 ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross- protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer. (CVE-2021-3618)

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

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

Solution

Run 'dnf update sendmail --releasever=2023.0.20230222 ' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-018.html

https://alas.aws.amazon.com/cve/html/CVE-2021-3618.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: High

ID: 173174

File Name: al2023_ALAS2023-2023-018.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/21/2023

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: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2021-3618

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:sendmail-cf, p-cpe:/a:amazon:linux:sendmail-milter-debuginfo, p-cpe:/a:amazon:linux:sendmail-milter-devel, p-cpe:/a:amazon:linux:sendmail, p-cpe:/a:amazon:linux:sendmail-doc, p-cpe:/a:amazon:linux:sendmail-debugsource, p-cpe:/a:amazon:linux:sendmail-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:sendmail-milter

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/17/2023

Vulnerability Publication Date: 10/25/2021

Reference Information

CVE: CVE-2021-3618