Files
rosenpass/util
Karolin Varner 6d47169a5c feat: Set CLOEXEC flag on claimed fds and mask them
Masking the file descriptors (by replaying them with a file descriptor pointing towards /dev/null)
mitigates use after free (on file descriptor) attacks. In case some
piece of code still holds a reference to the file descriptor, that
file descriptor now merely holds a reference to /dev/null.

Otherwise, the file descriptor might be reused and the reference
could now mistakenly point to all sorts of – potentially more harmful – files, such as memfd_secret
file descriptors, storing our secret keys.
2024-08-05 16:16:09 +02:00
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