[exim-dev] [Bug 3000] OOB access in SPA authenticator, clien…

https://bugs.exim.org/show_bug.cgi?id=3000

Jeremy Harris <jgh146exb@???> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
            Summary|(placeholder)               |OOB access in SPA
                   |                            |authenticator, client
           Priority|medium                      |high

--- Comment #1 from Jeremy Harris <jgh146exb@???> ---
ZDI-CAN-17515 (Trend Micro)

A large-enough domain given by a server can result in the buffer used by
the client code for building the challenge response to be overflowed.

Fix by checking all writss into the bufer.

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