CVE-2011-1764

CVE-2011-1764 describes a format string vulnerability in the dkim_exim_verify_finish function within Exim versions prior to 4.76. This flaw allows remote attackers to execute arbitrary code or trigger a denial of service by injecting format string specifiers into data used for DKIM logging, specifically through an identity field containing a percent character. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its low attack complexity and potential for complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.