Fedora 38 : postfix (2024-5c186175f2)

The remote Fedora 38 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2024-5c186175f2 advisory. Security fix for CVE-2023-51764. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not...

Fedora 39 : postfix (2024-c839e7294f)

The remote Fedora 39 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2024-c839e7294f advisory. Security fix for CVE-2023-51764. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not...

The vulnerability of the Postfix mail server’s smtpd service allows attackers to circumvent security restrictions and carry out email substitution attacks (type of SMTP Smuggling attack).

The vulnerability of the Postfix mail server’s smtp daemon is related to insufficient verification of data authenticity when processing line endings other than . Exploiting this vulnerability allows a malicious actor to bypass security restrictions and replace emails a type of SMTP smuggling atta...

Postfix SMTP Smuggling Vulnerability (Dec 2023)

Postfix is prone to a SMTP smuggling vulnerability. SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:postfix:postfix"; ifdescripti...

Postfix through 3.8.5 allows 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 supports <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 the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23 3.6.13 3.7.9 3.8.4 or 3.9.

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Exploit for Insufficient Verification of Data Authenticity in Postfix

CVE-2023-51764 CVE-2023-51764 poc Link...

SMTP Smuggling: New Flaw Lets Attackers Bypass Security and Spoof Emails

A new exploitation technique called Simple Mail Transfer Protocol SMTP smuggling can be weaponized by threat actors to send spoofed emails with fake sender addresses while bypassing security measures. "Threat actors could abuse vulnerable SMTP servers worldwide to send malicious emails from...

SUSE: Security Advisory (SUSE-SU-2024:0012-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

SUSE SLED15: postfix / postfix-bdb / postfix-bdb-lmdb / postfix-devel / etc (SUSE-SU-2024:0012-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2024:0012-1 advisory. - CVE-2023-51764: Fixed SMTP smuggling attack bsc1218304. Tenable has extracted the preceding description...

SUSE-SU-2024:0012-1 Security update for postfix

This update for postfix fixes the following issues: - CVE-2023-51764: Fixed SMTP smuggling attack bsc1218304...

SUSE SLED15: postfix / postfix-bdb / postfix-bdb-lmdb / postfix-devel / etc (SUSE-SU-2023:4981-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4981-1 advisory. - CVE-2023-51764: Fixed new SMTP smuggling attack bsc1218304. Tenable has extracted the preceding...

Exploit for Insufficient Verification of Data Authenticity in Postfix

PoC for CVE-2023-51764 SMTP SMUGGLING Postfix CVE-2023-51...

SUSE-SU-2023:4981-1 Security update for postfix

This update for postfix fixes the following issues: - CVE-2023-51764: Fixed new SMTP smuggling attack bsc1218304...

Exploit for Insufficient Verification of Data Authenticity in Postfix

CVE-2023-51764 Postfix SMTP Smuggling - Expect Script POC sen...

SMTP Smuggling

Postfix is vulnerable to SMTP smuggling. The vulnerability is caused due to support for . while handling line endings. A remote attacker can exploit this using published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection...

CVE-2023-51764

A flaw was found in some SMTP server configurations in Postfix. This flaw allows a remote attacker to break out email message data to "smuggle" SMTP commands and send spoofed emails that pass SPF checks. Out of the box, Postfix targets to accommodate older clients with faulty SMTP implementations...

SUSE CVE-2023-51764

Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpddatarestrictions=rejectunauthpipelining and smtpddiscardehlokeywords=chunking or certain other options that exist in recent versions. Remote attackers can use a published exploitation technique to inject e-mail messages with ...

Slackware: Security Advisory (SSA:2023-356-01)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

DEBIAN-CVE-2023-51764

Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpddatarestrictions=rejectunauthpipelining and smtpddiscardehlokeywords=chunking or certain other options that exist in recent versions. Remote attackers can use a published exploitation technique to inject e-mail messages with ...

AZL-32296 CVE-2023-51764 affecting package postfix for versions less than 3.7.0-3

Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpddatarestrictions=rejectunauthpipelining and smtpddiscardehlokeywords=chunking or certain other options that exist in recent versions. Remote attackers can use a published exploitation technique to inject e-mail messages with ...