A new report from the Acronis Threat Research Unit has uncovered a vulnerability in Microsoft Exchange Online settings that could enable email spoofing attacks.
This issue primarily affects users with a hybrid configuration of on-premises Exchange and Exchange Online, and those utilizing third-party email security solutions. In July 2023, Microsoft introduced a major change in how it handles DMARC (Domain-based Message Authentication, Reporting, and Conformance) within Microsoft Exchange. This update was intended to bolster security by enhancing how email servers verify incoming emails’ legitimacy. Unfortunately, despite clear guidance from Microsoft, a considerable number of users have yet to implement these security measures.
Read more…
Source: TechRadar News
Related:
- Actively exploited Windows MoTW zero-day gets unofficial patch
October 30, 2022
A free unofficial patch has been released for an actively exploited zero-day that allows files signed with malformed signatures to bypass Mark-of-the-Web security warnings in Windows 10 and Windows 11. Last weekend, BleepingComputer reported that threat actors were using stand-alone JavaScript files to install the Magniber ransomware on victims’ devices. When a user downloads a file from ...
- Attack Surface Management 2022 Midyear Review – Part 2
October 27, 2022
The cybersecurity landscape changed significantly in the first half of 2022. In our midyear roundup, Trend Micro researchers examine these changes and their effects on business operations as well as what you need to know about staying protected from online attacks. In part one of the series, Trend Micro researchers talked about the growing attack surface ...
- CISA Adds Six Known Exploited Vulnerabilities to Catalog
October 24, 2022
CISA has added six vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise. Note: to view the newly added vulnerabilities in the catalog, click on the arrow in the “Date Added ...
- Apple fixes new zero-day used in attacks against iPhones, iPads
October 24, 2022
In security updates released on Monday, Apple has fixed the ninth zero-day vulnerability used in attacks against iPhones since the start of the year. Apple revealed in an advisory today that it’s aware of reports saying the security flaw “may have been actively exploited.” The bug (CVE-2022-42827) is an out-of-bounds write issue reported to Apple by an ...
- Exploited Windows zero-day lets JavaScript files bypass security warnings
October 22, 2022
An update was added to the end of the article explaining that any Authenticode-signed file, including executables, can be modified to bypass warnings. A new Windows zero-day allows threat actors to use malicious stand-alone JavaScript files to bypass Mark-of-the-Web security warnings. Threat actors are already seen using the zero-day bug in ransomware attacks. Windows includes a security ...
- CISA Adds Two Known Exploited Vulnerabilities to Catalog
October 20, 2022
CISA has added two vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise. Note: to view the newly added vulnerabilities in the catalog, click on the arrow in the “Date Added ...