Date: Sun, 23 Sep 2012 06:59:47 +0400 From: Solar Designer <solar@...nwall.com> To: oss-security@...ts.openwall.com Subject: Re: tiff2pdf: Heap-based buffer overflow due to improper initialization of T2P context struct pointer On Thu, Jul 19, 2012 at 08:15:59AM +0530, Huzaifa Sidhpurwala wrote: > I found the following flaw in the tiff2pdf tool, shipped with libtiff: > > A heap-based buffer overflow flaw was found in the way tiff2pdf, a TIFF > image to a PDF document conversion tool, of libtiff, a library of > functions for manipulating TIFF (Tagged Image File Format) image format > files, performed write of TIFF image content into particular PDF > document file, when not properly initialized T2P context struct pointer > has been provided by tiff2pdf (application requesting the conversion) > as one of parameters for the routine performing the write. A remote > attacker could provide a specially-crafted TIFF image format file, that > when processed by tiff2pdf would lead to tiff2pdf executable crash or, > potentially, arbitrary code execution with the privileges of the user > running the tiff2pdf binary. > > This issue has been assigned CVE-2012-3401. > > Reference: > https://bugzilla.redhat.com/show_bug.cgi?id=837577 > > The relevant patch for the issue has been applied to upstream > libtiff-4.0.2 branch This is finally patched in 4.0.3: http://www.remotesensing.org/libtiff/v4.0.3.html Frank Denis additionally noted: http://twitter.com/jedisct1/status/249699555115945984 "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. Alexander
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