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authorAlan Coopersmith <alan.coopersmith@oracle.com>2015-03-06 22:54:58 -0800
committerMike DePaulo <mikedep333@gmail.com>2015-03-28 13:06:17 -0400
commit9f1b041e535c4da6ffbe95a706d46b3bfb5c0321 (patch)
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bdfReadCharacters: ensure metrics fit into xCharInfo struct [CVE-2015-1804]
We use 32-bit ints to read from the bdf file, but then try to stick into a 16-bit int in the xCharInfo struct, so make sure they won't overflow that range. Found by afl-1.24b. v2: Verify that additions won't overflow 32-bit int range either. v3: As Julien correctly observes, the previous check for bh & bw not being < 0 reduces the number of cases we need to check for overflow. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Julien Cristau <jcristau@debian.org> (cherry picked from commit 2351c83a77a478b49cba6beb2ad386835e264744)
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