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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)

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: 1.0

Type: local

Agent: unix

Published: 3/21/2023

Updated: 3/21/2023

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-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, p-cpe:/a:amazon:linux:sendmail-cf, 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