MaraDNS developer Sam Trenholme reports:
... a mistake in allocating an array of integers, allocating it in bytes instead of sizeof(int) units. This resulted in a buffer being too small, allowing it to be overwritten. The impact of this programming error is that MaraDNS can be crashed by sending MaraDNS a single "packet of death". Since the data placed in the overwritten array can not be remotely controlled (it is a list of increasing integers), there is no way to increase privileges exploiting this bug.
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