CVE-2022-48521

Summary

CVE-2022-48521 is a vulnerability affecting OpenDKIM versions 2.10.3 and 2.11.x through 2.11.0-Beta2. The issue arises due to a tracking problem with ordinal numbers in OpenDKIM's handling of Authentication-Results header fields. Maliciously crafted e-mail messages can exploit this vulnerability by including fake sender addresses with forged Authentication-Results headers. Subsequently, software relying on OpenDKIM for signature validation may incorrectly assume that the message possesses a valid DKIM signature, despite it being nonexistent.

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