Date: Tue, 25 Sep 2012 14:36:32 +0530 From: Huzaifa Sidhpurwala <huzaifas@...hat.com> To: oss-security@...ts.openwall.com, Kurt Seifried <kseifried@...hat.com> Subject: CVE Request: libtiff: Heap-buffer overflow when processing a TIFF image with PixarLog Compression On 09/23/2012 08:29 AM, Solar Designer wrote: > "libtiff 4.0.3 brings "various memory buffer access fixes". Does it fix > more than CVE-2012-3401?" > > to which I have no answer. The change log does in fact mention > "Various memory buffer access fixes." as the very first change listed > for libtiff. Perhaps someone should review code changes. > I had a look at the libtiff-4.0.3 commit logs and found one issue which seems to bring a possibility of heap-based buffer overflow when using a tiff file with PixarLog compression format. More details at: https://bugzilla.redhat.com/show_bug.cgi?id=860198 Though memory overwrite outside the heap-buffer is only a few bytes, one cannot really overwrite possible arbitrary code execution. Can a CVE id be please assigned to the above flaw? Found two other commits which seemed interesting, but i dont think they could cause arbitrary code execution and i dont want to call them security flaws. 1. OOB read crash tif_packbits.c 2. Memory not properly initialised in tif_fax3.c. Again this one was partly fixed in 4.0.2 and completely fixed in 4.0.3 If anyone else wants to investigate these in more details, please be my guest :) Thanks! -- Huzaifa Sidhpurwala / Red Hat Security Response Team
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