CVE-2024-23185

Very large headers can cause resource exhaustion when parsing message. The message-parser normally reads reasonably sized chunks of the message. However, when it feeds them to message-header-parser, it starts building up "fullvalue" buffer out of the smaller chunks. The fullvalue buffer has no si...

CVE-2024-23184

Having a large number of address headers From, To, Cc, Bcc, etc. becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors...

CVE-2024-23184

CVE-2024-23184 affects the Dovecot IMAP/POP3 server. The root issue is that parsing a large number of email address headers (From, To, Cc, Bcc, etc.) is highly CPU-intensive, leading to potential denial of service when attackers send crafted messages that trigger resource exhaustion. The availabl...

CVE-2024-23184

Having a large number of address headers From, To, Cc, Bcc, etc. becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors...

CVE-2024-23184

Having a large number of address headers From, To, Cc, Bcc, etc. becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors...

CVE-2024-23184: Allocation of Resources Without Limits or Throttling

Having a large number of address headers From, To, Cc, Bcc, etc. becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors...

Dovecot IMAP Server 2.2 / 2.3 Denial Of Service

Affected product: Dovecot IMAP Server Internal reference: DOV-6601 Vulnerability type: CWE-770 Allocation of Resources Without Limits or Throttling Vulnerable version: 2.2, 2.3 Vulnerable component: lib-mail Report confidence: Confirmed Solution status: Fixed in 2.3.21.1 Researcher credits: Vendo...

PT-2024-7272

Name of the Vulnerable Software and Affected Versions: Dovecot affected versions not specified Description: The issue is related to resource exhaustion when parsing messages with very large headers. The message-parser reads reasonably sized chunks of the message, but when it feeds them to the...

Fedora: Security Advisory (FEDORA-2024-55603127f3)

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...

Ubuntu: Security Advisory (USN-6881-1)

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...

USN-6881-1: Exim vulnerability

It was discovered that Exim did not enforce STARTTLS sync point on client side. An attacker could possibly use this issue to perform response injection during MTA SMTP sending...

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : Exim vulnerability (USN-6881-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6881-1 advisory. It was discovered that Exim did not enforce STARTTLS sync point on client side. An attacker could possibly use this issue to...

[SECURITY] Fedora 38 Update: amavis-2.13.1-1.fc38

amavis is a high-performance and reliable interface between mailer MTA and one or more content checkers: virus scanners, and/or Mail::SpamAssassin Perl module. It is written in Perl, assuring high reliability, portability and maintainability. It talks to MTA via ESMTP or LMTP, or by using helper...

[SECURITY] Fedora 40 Update: amavis-2.13.1-1.fc40

amavis is a high-performance and reliable interface between mailer MTA and one or more content checkers: virus scanners, and/or Mail::SpamAssassin Perl module. It is written in Perl, assuring high reliability, portability and maintainability. It talks to MTA via ESMTP or LMTP, or by using helper...

Fedora: Security Advisory for postfix (FEDORA-2024-5c186175f2)

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...

[SECURITY] Fedora 38 Update: postfix-3.7.9-1.fc38

Postfix is a Mail Transport Agent MTA...

[SECURITY] Fedora 39 Update: postfix-3.8.4-1.fc39

Postfix is a Mail Transport Agent MTA...

Exim finally fixes 3 out of 6 vulnerabilities

Exim is a message transfer agent MTA originally developed at the University of Cambridge for use on Unix systems connected to the internet, and is freely available under the terms of the GNU General Public Licence. Even though the name may be new to you, a Shodan search revealed 3.5 million serve...

Vulnerabilities fixed in Exim

Exim has fixed vulnerabilities in Exim MTA. The vulnerabilities allow a malicious party to perform attacks that lead to the following categories of damage: Remote code execution Administrator/Root privileges. Access to system/data data Exim has released updates to fix the vulnerabilities in Exim...

Exim Security Vulnerabilities

Exim is an open source messaging agent MTA from Exim Open Source that runs on Unix systems and is responsible for routing, forwarding and delivering mail. Exim has a security vulnerability that stems from a lack of proper validation of user-supplied data. An attacker exploiting this vulnerability...