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344064
2006 Nov 19
0
Security hole #2: Off-by-one buffer overflow with mmap_disable=yes
Version: 1.0test53 .. 1.0.rc14 (ie. all 1.0alpha, 1.0beta and 1.0rc
versions so far).
0.99.x versions are safe (they don't even have mmap_disable setting).
Problem: When mmap_disable=yes setting is used, dovecot.index.cache file
is read to memory using "file cache" code. It contains a "mapped pages"
bitmask buffer. In some conditions when updating the buffer it allocates