Date: Thu, 14 Nov 2013 16:07:00 +1100 From: Murray McAllister <mmcallis@...hat.com> To: oss-security@...ts.openwall.com CC: Kurt Seifried <kseifrie@...hat.com>, carnil@...ian.org Subject: Re: CVE request: ppthtml heap-based buffer overflow On 11/14/2013 03:11 PM, Murray McAllister wrote: > Morning, > > A heap-based buffer overflow flaw was reported in ppthtml: > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=729279 > > Looking in xlhtml-0.5-15.fc19.src.rpm, I think the root cause of the > problem is in __OLEdecode() with an under allocation here: > > 163 BDepot = (U8 *) malloc (0x0200 * (num_bbd_blocks + num_xbbd_blocks)); Setting num_bbd_blocks and num_xbbd_blocks both to "1" also leads similar problems.
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