InfoSecBulletin Cybersecurity for mankind
A lot number of microsoft Exchange email servers in Europe, the United States, and Asia are at risk because they are accessible on the public internet. These servers are using an old and unsupported version of the software, which makes them vulnerable to multiple security issues, including some that are very serious.
The ShadowServer Foundation found 20,000 Microsoft Exchange servers that have reached the end-of-life stage are still accessible online. Most of these servers are in Europe, but there are also many in North America and Asia.
Multiple Azure DevOps Vulns Allow To Inject CRLF Queries & Rebind DNS
Intel holds 22 employees from one Bangladeshi University
VPN Surge 1500% in USA after TikTok Shut Down
MITRE Launches D3FEND 1.0; The Milestone for Cybersecurity Ontology
AWS Patches Multiple Vulns in WorkSpaces, AppStream 2.0
Malware Trends Review 2024: Ever Recorded Cyber Threats
Botnet Exploits 13,000 MikroTik Devices Abusing Misconfigured DNS
CVE-2024-9042
Code Execution Vulnerability Found in Kubernetes Windows Nodes
Hacker leaked 15k config files and VPN passwords of FortiGate firewall device
Registration open for 1st Agile Cyber Drill 2025
ShadowServer’s statistics may not show the complete situation. Macnica security researcher Yutaka Sejiyama discovered that there are 30,000 Microsoft Exchange servers that are no longer supported. Sejiyama’s scans on Shodan revealed that these unsupported servers include versions such as Exchange Server 2007, Exchange Server 2010, and most instances of Exchange Server 2013.
Outdated Exchange servers found by ShadowServer and Sejiyama have many vulnerabilities that allow remote code execution. An important security problem is ProxyLogon (CVE-2021-26855) which, when combined with another bug (CVE-2021-27065), allows remote code execution. Sejiyama’s analysis shows that around 1,800 vulnerable Exchange systems are exposed to ProxyLogon, ProxyShell, or ProxyToken vulnerabilities.
Organizations have taken steps to deal with these vulnerabilities, but it’s important to know that these measures are not enough. Microsoft advises companies to prioritize updating servers connected to external networks. If servers are no longer supported, upgrading to a version that still receives security updates is the only viable option.
Organizations must act immediately to address the ongoing exploitation of these vulnerabilities and the large number of exposed servers. They should secure their Exchange servers and ensure they are using supported and updated software versions. This will help protect sensitive data and minimize risks.
