Remote Code Execution in OpenSMTPD Server via Out-of-Bounds Read in mta_io

Remote Code Execution in OpenSMTPD Server via Out-of-Bounds Read in mta_io

CVE-2020-8794 · CRITICAL Severity

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.

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