CVE-2023-26432

Summary

CVE-2023-26432 is a vulnerability in which processing of SMTP "capabilities" responses during the addition of an external mail account is not size-limited. An attacker operating a rogue SMTP server can exploit this by sending responses of excessive size, leading to resource exhaustion and potential service unavailability. The vulnerability does not currently have any publicly available exploits, but affected systems have been updated to limit accepted SMTP server responses to reasonable sizes to mitigate the risk.

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