9.EmailServers Atsign

Three critical security vulnerabilities have been discovered in the widely-used Exim open-source email transfer agent, including a NTLM challenge out-of-bounds read information disclosure bug (CVE-2023-42114), a AUTH out-of-bounds write remote code execution (RCE) vulnerability (CVE-2023-42115), and a SMTP challenge stack-based buffer overflow RCE flaw (CVE-2023-42116).

These issues could result in malware execution, system compromise, and information disclosure on impacted systems.

An essential update for Exim has been released to fix these critical issues. We strongly recommend that all affected users apply the updates released by Debian, Debian LTS, openSUSE, and Ubuntu now to protect their critical systems and sensitive data against attacks leading to compromise.

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