Published at LXer:

Standards like POSIX are meant to make life easier for application developers by providing rules on the semantics of system calls for multiple different platforms. Sometimes, though, operating system developers decide to change the behavior of their platform—with full knowledge that it breaks compatibility—for various reasons. This requires application developers to notice the change and take appropriate action; not doing so can lead to a security hole like the one found in the Postfix mail transfer agent (MTA) recently.

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