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Debian dla-3725 : postfix - security update

medium Nessus Plugin ID 189772

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3725 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3725-1 [email protected] https://www.debian.org/lts/security/ Bastien Roucaris January 30, 2024 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : postfix Version : 3.4.23-0+deb10u2 CVE ID : CVE-2023-51764 Debian Bug : 1059230

 Postfix, a popular mail server, allowed SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions).

 Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism.

 This occurs because Postfix supported <LF>.<CR><LF> but some other popular e-mail servers do not.

 To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as setting the backported configuration option smtpd_forbid_bare_newline=yes

 For Debian 10 buster, this problem has been fixed in version 3.4.23-0+deb10u2.

 We recommend that you upgrade your postfix packages.

 For the detailed security status of postfix please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/postfix

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the postfix packages.

See Also

https://security-tracker.debian.org/tracker/source-package/postfix

https://security-tracker.debian.org/tracker/CVE-2023-51764

https://packages.debian.org/source/buster/postfix

Plugin Details

Severity: Medium

ID: 189772

File Name: debian_DLA-3725.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/30/2024

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2023-51764

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:postfix, p-cpe:/a:debian:debian_linux:postfix-ldap, p-cpe:/a:debian:debian_linux:postfix-cdb, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:postfix-mysql, p-cpe:/a:debian:debian_linux:postfix-lmdb, p-cpe:/a:debian:debian_linux:postfix-pcre, p-cpe:/a:debian:debian_linux:postfix-sqlite, p-cpe:/a:debian:debian_linux:postfix-doc, p-cpe:/a:debian:debian_linux:postfix-pgsql

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/30/2024

Vulnerability Publication Date: 12/24/2023

Reference Information

CVE: CVE-2023-51764