CVE-2004-1067

CVE-2004-1067 is a critical buffer overflow vulnerability in the mysasl_canon_user function of Cyrus IMAP Server versions 2.2.9 and earlier, impacting various distributions including Carnegie Mellon University, Fedora Core, Red Hat, and Ubuntu. This flaw, caused by an off-by-one error, allows unauthenticated remote attackers to execute arbitrary code by crafting a malicious username. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation in the KEV catalog or public exploit frameworks like Metasploit or ExploitDB, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.