CVE-2005-0021

CVE-2005-0021 describes multiple buffer overflow vulnerabilities in Exim versions prior to 4.43, specifically impacting the university_of_cambridge Exim mail transfer agent. These flaws, found in the host_aton and dns_build_reverse functions, could allow attackers to execute arbitrary code. With a CVSS score of 7.2, this vulnerability is rated as high severity, indicating that a local attacker could achieve full confidentiality, integrity, and availability compromise with low attack complexity. While not listed on the KEV catalog, exploit code for local buffer overflows exists on ExploitDB, though there is no evidence of active exploitation or significant community discussion.