Security News > 2024 > July > Critical Exim bug bypasses security filters on 1.5 million mail servers

Critical Exim bug bypasses security filters on 1.5 million mail servers
2024-07-12 20:48

Censys warns that over 1.5 million Exim mail transfer agent instances are unpatched against a critical vulnerability that lets threat actors bypass security filters.

Tracked as CVE-2024-39929 and patched by Exim developers on Wednesday, the security flaw impacts Exim releases up to and including version 4.97.1.

According to the survey, over 59% of the 409,255 mail servers reachable on the Internet during the survey were running Exim, representing just over 241,000 Exim instances.

Per a Shodan search, over 3.3 million Exim servers are currently exposed online, most in the United States, followed by Russia and the Netherlands.

The National Security Agency revealed in May 2020 that the notorious Russian military hacking group Sandworm has been exploiting a critical CVE-2019-10149 Exim flaw since at least August 2019.

More recently, in October, the Exim devs patched three zero-days disclosed through Trend Micro's Zero Day Initiative, one of them exposing millions of Internet-exposed Exim servers to pre-auth RCE attacks.


News URL

https://www.bleepingcomputer.com/news/security/critical-exim-bug-bypasses-security-filters-on-15-million-mail-servers/

Related vendor

VENDOR LAST 12M #/PRODUCTS LOW MEDIUM HIGH CRITICAL TOTAL VULNS
Exim 1 0 5 21 15 41