CVE-2016-9448

The TIFFFetchNormalTag function in LibTiff 4.0.6 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by setting the tags TIFF_SETGET_C16ASCII or TIFF_SETGET_C32_ASCII to values that access 0-byte arrays. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9297.

The updated packages fix:

• A regression introduced by the fix for CVE-2016-9297 (CVE-2016-9448).
• An out-of-bounds Write memcpy and less bound check in tiff2pdf (CVE-2016-9453).

These are all security issues fixed in the libtiff-devel-32bit-4.0.7-1.1 package on the GA media of openSUSE Tumbleweed.

The tiff library and tools were updated to version 4.0.7 fixing various bug and security issues.

• CVE-2014-8127: out-of-bounds read with malformed TIFF image in multiple tools [bnc#914890]
• CVE-2016-9297: tif_dirread.c read outside buffer in _TIFFPrintField() [bnc#1010161]
• CVE-2016-3658: Illegal read in TIFFWriteDirectoryTagLongLong8Array function in tiffset / tif_dirwrite.c [bnc#974840]
• CVE-2016-9273: heap overflow [bnc#1010163]
• CVE-2016-3622: divide By Zero in the tiff2rgba tool [bnc#974449]
• CVE-2016-5652: tiff2pdf JPEG Compression Tables Heap Buffer Overflow [bnc#1007280]
• CVE-2016-9453: out-of-bounds Write memcpy and less bound check in tiff2pdf [bnc#1011107]
• CVE-2016-5875: heap-based buffer overflow when using the PixarLog compressionformat [bnc#987351]
• CVE-2016-9448: regression introduced by fixing CVE-2016-9297 [bnc#1011103]
• CVE-2016-5321: out-of-bounds read in tiffcrop / DumpModeDecode() function [bnc#984813]
• CVE-2016-5323: Divide-by-zero in _TIFFFax3fillruns() function (null ptr dereference?) [bnc#984815]

It was discovered that LibTIFF incorrectly handled certain malformed images. If a user or automated system were tricked into opening a specially crafted image, a remote attacker could crash the application, leading to a denial of service, or possibly execute arbitrary code with user privileges.