OpenSMTPD 6.4.0 6.6.1 - Local Privilege Escalation + Remote Code Execution

OpenSMTPD 6.4.0 6.6.1 - Local Privilege Escalation + Remote Code Execution Exploit Title: OpenSMTPD 6.6.1 - Local Privilege Escalation Date: 2020-02-02 Exploit Author: Marco Ivaldi Vendor Homepage: https://www.opensmtpd.org/ Version: OpenSMTPD 6.4.0 - 6.6.1 Tested on: OpenBSD 6.6, Debian GNU/Linu...

OpenSMTPD 6.6.1 Local Privilege Escalation

Exploit Title: OpenSMTPD 6.6.1 - Local Privilege Escalation Date: 2020-02-02 Exploit Author: Marco Ivaldi Vendor Homepage: https://www.opensmtpd.org/ Version: OpenSMTPD 6.4.0 - 6.6.1 Tested on: OpenBSD 6.6, Debian GNU/Linux bullseye/sid with opensmtpd 6.6.1p1-1 CVE: CVE-2020-7247 !/usr/bin/perl...

OpenSMTPD 6.6.1 - Local Privilege Escalation Exploit

Exploit Title: OpenSMTPD 6.6.1 - Local Privilege Escalation Date: 2020-02-02 Exploit Author: Marco Ivaldi Vendor Homepage: https://www.opensmtpd.org/ Version: OpenSMTPD 6.4.0 - 6.6.1 Tested on: OpenBSD 6.6, Debian GNU/Linux bullseye/sid with opensmtpd 6.6.1p1-1 CVE: CVE-2020-7247 !/usr/bin/perl...

The vulnerability in the smtp_mailaddr function (smtp_session.c) of the OpenSMTPD mail daemon on the OpenBSD operating system allows a hacker to elevate their privileges and execute arbitrary commands with root privileges.

The vulnerability in the smtpmailaddr function smtpsession.c of the OpenSMTPD mail daemon on the OpenBSD operating system is related to the lack of data validation during return operations. Exploitation of this vulnerability allows a remote attacker to execute arbitrary commands with root...

OpenSMTPD 6.4.0 < 6.6.1 - Local Privilege Escalation + Remote Code Execution

Exploit Title: OpenSMTPD 6.6.1 - Local Privilege Escalation Date: 2020-02-02 Exploit Author: Marco Ivaldi Vendor Homepage: https://www.opensmtpd.org/ Version: OpenSMTPD 6.4.0 - 6.6.1 Tested on: OpenBSD 6.6, Debian GNU/Linux bullseye/sid with opensmtpd 6.6.1p1-1 CVE: CVE-2020-7247 !/usr/bin/perl...

OpenSMTPD MAIL FROM command injection

Added: 02/10/2020 CVE: CVE-2020-7247 Background OpenSMTPD is a free SMTP implementation. It comes with the OpenBSD operating system but is also available for other platforms. Problem The smtpmailaddr function does not properly sanitize user input, allowing remote attackers to inject arbitrary...

[SECURITY] Fedora 31 Update: libasr-1.0.4-1.fc31

Libasr allows to run DNS queries and perform hostname resolutions in a fully asynchronous fashion. The implementation is thread-less, fork-less, and doe s not make use of signals or other "tricks" that might get in the developer's way. The API was initially developed for the OpenBSD operating...

[SECURITY] Fedora 30 Update: opensmtpd-6.6.2p1-1.fc30

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defi ned by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange e-mails with other systems speaking the SMTP protocol. Started out of dissatisfaction with other implementations, OpenSMTP...

Fedora: Security Advisory for opensmtpd (FEDORA-2020-270ef80e9e)

The remote host is missing an update for the SPDX-FileCopyrightText: 2020 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...

Fedora: Security Advisory for libasr (FEDORA-2020-270ef80e9e)

The remote host is missing an update for the SPDX-FileCopyrightText: 2020 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...

OpenSMTPD Remote Command Execution Vulnerability

OpenSMTPD is a free server-side implementation of the SMTP protocol developed by the OpenBSD team, defined via RFC5321 and part of the OpenBSD project. A remote command execution vulnerability exists in OpenSMTPD. It allows remote attackers to execute arbitrary commands as root via a specially...

OpenSMTPD Vulnerability

The CERT Coordination Center CERT/CC has released information on a vulnerability affecting OpenSMTPD. An attacker could exploit this vulnerability to take control of an affected system. OpenSMTPD is an open-source server-side implementation of the Simple Mail Transfer Protocol SMTP that is part o...

OpenSMTPD vulnerable to local privilege escalation and remote code execution

Overview Qualys Research Labs found that the smtpmailaddr function in OpenSMTPD version 6.6 does not properly sanitize user input, which could allow a local attacker to escalate their privileges, and allow either a local or remote attacker to execute arbitrary code as root. Description OpenSMTPD ...

Exploit for Improper Handling of Exceptional Conditions in Openbsd Opensmtpd

cve-2020-7247-exploit Python...

Critical OpenSMTPD Bug Opens Linux and OpenBSD Mail Servers to Hackers

Cybersecurity researchers have discovered a new critical vulnerability CVE-2020-7247 in the OpenSMTPD email server that could allow remote attackers to take complete control over BSD and many Linux based servers. OpenSMTPD is an open-source implementation of the server-side SMTP protocol that was...

Critical OpenSMTPD Bug Opens Linux and OpenBSD Mail Servers to Hackers

Cybersecurity researchers have discovered a new critical vulnerability CVE-2020-7247 in the OpenSMTPD email server that could allow remote attackers to take complete control over BSD and many Linux based servers. OpenSMTPD is an open-source implementation of the server-side SMTP protocol that was...

OpenBSD OpenSMTPD Remote Code Execution Vulnerability (CVE-2020-7247)

Qualys Research Labs discovered a vulnerability in OpenBSD's OpenSMTPD mail server that allows an attacker to execute arbitrary shell commands with elevated privileges. OpenBSD developers have confirmed the vulnerability and also quickly provided a patch. Proof-of-concept exploits are published i...

Input validation

smtpmailaddr in smtpsession.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration...

CVE-2020-7247

smtpmailaddr in smtpsession.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration...

CVE-2020-7247

CVE-2020-7247 affects OpenSMTPD 6.6 (OpenBSD 6.6 and others). The smtp_mailaddr() check in smtp_session.c can pass malformed local-parts with an empty domain, due to an incorrect return value on input validation, enabling remote root code execution via a crafted SMTP session (MAIL FROM) on the de...