CVE-2023-42115

CVE-2023-42115 is a critical vulnerability identified in all versions of Exim, an open-source mail transfer agent widely used on Unix systems. This flaw was discovered by an anonymous security researcher and disclosed through Trend Micro's Zero Day Initiative (ZDI). The vulnerability is due to an Out-of-bounds Write weakness found in the SMTP service, which could potentially impact millions of Exim servers worldwide. The issue was recently detected by NSFOCUS CERT, who noted it as an Exim remote code execution vulnerability. This means that an attacker could exploit the vulnerability to execute arbitrary code on the server running Exim, effectively taking control of the system. As such, this vulnerability poses a significant risk to organizations relying on Exim for their email services. In response to the disclosure, an advisory was issued by ZDI, detailing the nature of the flaw and its potential impact. Organizations are strongly advised to review this advisory and take appropriate steps to mitigate the risk associated with CVE-2023-42115. Given the widespread use of Exim and the severity of the vulnerability, immediate attention to this issue is crucial to prevent potential cyber attacks.