Spoofing

Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs...

CVE-2020-36519

Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs...

CVE-2020-36519

CVE-2020-36519 (Mimecast Email Security) : The vulnerability, affecting Mimecast Email Security prior to 2020-01-10, allows any administrator to spoof any domain and bypass DMARC alignment via SPF by abusing the address rewrite feature. The spoofed domain must be a customer in the Mimecast grid f...

Mimecast Email Security 安全漏洞

Mimecast Email Security is Mimecast's appliance for email security. A security vulnerability exists in Mimecast Email Security that allows any administrator to spoof any domain and pass DMARC alignment via SPF. This occurs through abuse of the address rewriting feature. The spoofed domain must be...

Mageia: Security Advisory (MGASA-2021-0462)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 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...

Cybercriminals Love Supply-Chain Chaos: Here’s How to Protect Your Inbox

Over the last couple of months, the Zix Threat Research team has observed threat actors using new tactics to spoof logistics and supply-chain companies, hoping for an easy compromise. As we have seen throughout the COVID-19 pandemic, cybercriminals are flourishing in these times of upheaval, due ...

SpoofThatMail - Bash Script To Check If A Domain Or List Of Domains Can Be Spoofed Based In DMARC Records

Bash script to check if a domain or list of domains can be spoofed based in DMARC records File with domains: sh SpoofThatMail.sh -f domains.txt One single domain: sh SpoofThatMail.sh -d domain Download SpoofThatMail...

MGASA-2021-0462 Updated opendmarc packages fix security vulnerability

OpenDMARC through 1.3.2 and 1.4.x, when used with pypolicyd-spf 2.0.2, allows attacks that bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field CVE-2019-20790. OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication...

Updated opendmarc packages fix security vulnerability

OpenDMARC through 1.3.2 and 1.4.x, when used with pypolicyd-spf 2.0.2, allows attacks that bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field CVE-2019-20790. OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication...

How Does DMARC Prevent Phishing?

DMARC is a global standard for email authentication. It allows senders to verify that the email really comes from whom it claims to come from. This helps curb spam and phishing attacks, which are among the most prevalent cybercrimes of today. Gmail, Yahoo, and many other large email providers hav...

Get free DMARC visibility with Valimail Authenticate and Microsoft Office 365

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA. Phishing and email spoofing not only erode brand trust but also leave recipients vulnerable to financial loss and serious invasions of privacy. These tactics have been around for...

Get free DMARC visibility with Valimail Authenticate and Microsoft Office 365

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA. Phishing and email spoofing not only erode brand trust but also leave recipients vulnerable to financial loss and serious invasions of privacy. These tactics have been around for...

BIMI: A Visual Take on Email Authentication and Security

There is a saying that goes something like, "Do not judge a book by its cover." Yet, we all know we can not help but do just that - especially when it comes to online security. Logos play a significant role in whether or not we open an email and how we assess the importance of each message. Brand...

[SECURITY] Fedora 33 Update: opendmarc-1.4.1.1-3.fc33

OpenDMARC Domain-based Message Authentication, Reporting & Conformance provides an open source library that implements the DMARC verification service plus a milter-based filter application that can plug in to any milter-aware MTA, including sendmail, Postfix, or any other MTA that supports the...

[SECURITY] Fedora 34 Update: opendmarc-1.4.1.1-3.fc34

OpenDMARC Domain-based Message Authentication, Reporting & Conformance provides an open source library that implements the DMARC verification service plus a milter-based filter application that can plug in to any milter-aware MTA, including sendmail, Postfix, or any other MTA that supports the...

DMARC: The First Line of Defense Against Ransomware

There has been a lot of buzz in the industry about ransomware lately. Almost every other day, it's making headlines. With businesses across the globe holding their breath, scared they might fall victim to the next major ransomware attack, it is now time to take action. The FBI IC3 report of 2020...

Rapid7 Releases New Industry Cyber-Exposure Report (ICER): Deutsche Börse Prime Standard

Today, Rapid7 released the fourth in our Industry Cyber-Exposure Report ICER series. For those of you who have been following our research over the past few years, you may immediately suspect us of unloading another 100+ page tome of internet-based findings around the internet—but not so fast!...

DEBIAN-CVE-2021-34555

OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service NULL pointer dereference and application crash via a multi-value From header field...

CVE-2021-34555

OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service NULL pointer dereference and application crash via a multi-value From header field...

Email spoofing: how attackers impersonate legitimate senders

Introduction In a nutshell, email spoofing is the creation of fake emails that seem legitimate. This article analyzes the spoofing of email addresses through changing the From header, which provides information about the senders name and address. SMTP Simple Mail Transfer Protocol, the main email...