fetchmail -- null pointer dereference in multidrop mode with headerless email
The fetchmail team reports:
Fetchmail contains a bug that causes an application crash
when fetchmail is configured for multidrop mode and the
upstream mail server sends a message without headers. As
fetchmail does not record this message as "previously fetched",
it will crash with the same message if it is re-executed, so it
cannot make progress. A malicious or broken-into upstream server
could thus cause a denial of service in fetchmail clients.
Copyright © 2003-2005 Jacques Vidrine and contributors.
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