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QMail RCPT Denial of Service Vulnerability
Solution: Setting user resource limits on the server process will prevent Qmail from allocating enough memory to cause a denial of service. The following command will set the maximum amount of memory processes can allocate in the heap to 1 MB. 'ulimit -d 1024'. If placed in the init scripts, the limit will be put in place whenever the system intializes. This information was supplied by Dan Bernstein <djb@cr.yp.to>. |
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