InfoSecBulletin Cybersecurity for mankind
Censys has warned that more than 1.5 million Exim mail transfer agent (MTA) instances are vulnerable to a critical security issue. This vulnerability allows threat actors to bypass security filters.
Exim developers fixed a security flaw, tracked as CVE-2024-39929, impacting versions up to 4.97.1.
Nepal Unveils First “Hall of Fame” for Ethical Hackers
900+ Oracle E-Business instances Exposed Online
India asks WhatsApp not to roll out ‘username’ feature over fraud concerns
Azure CLI Password Spray Impacts 78 Microsoft Accounts in 81M+ Attempts
Chrome Update Patches 382 Vulnerabilities, Including 15 Critical
Apple fixes more than 30 iOS, macOS, and Safari flaws
Attackers exploit critical flaw in Oracle E-Business
WhatsApp to allow usernames instead of phone numbers
Linux Unveils New Open Source Security Project “Akrites” For (OSS) Ecosystem
Data breach affects 14.2 million email logins across six ISPs
The vulnerability is caused by not parsing multiline RFC2231 header filenames correctly, allowing remote attackers to send harmful executable attachments to end users’ mailboxes by bypassing the protection mechanism.
“If a user were to download or run one of these malicious files, the system could be compromised,” Censys warned, adding that “a PoC is available, but no active exploitation is known yet.”
“As of July 10, 2024, Censys observes 1,567,109 publicly exposed Exim servers running a potentially vulnerable version (4.97.1 or earlier), concentrated mostly in the United States, Russia, and Canada,” the company added.
59% of the 409,255 mail servers on the Internet were running Exim, which is more than 241,000 instances.
According to Shodan, there are over 3.3 million Exim servers exposed online, most in the United States, followed by Russia and the Netherlands. Censys found 6,540,044 public mail servers online, with roughly 74% of them running Exim.
