Multiple vulnerabilities has been discovered and corrected in libtiff: The TIFFYCbCrtoRGB function in LibTIFF 3.9.0 and 3.9.2, as used in ImageMagick, does not properly handle invalid ReferenceBlackWhite values, which allows remote attackers to cause a denial of service via a crafted TIFF image that triggers an array index error, related to downsampled OJPEG input. Multiple integer overflows in the Fax3SetupState function in tif_fax3.c in the FAX3 decoder in LibTIFF before 3.9.3 allow remote attackers to execute arbitrary code or cause a denial of service via a crafted TIFF file that triggers a heap-based buffer overflow . Integer overflow in the TIFFroundup macro in LibTIFF before 3.9.3 allows remote attackers to cause a denial of service or possibly execute arbitrary code via a crafted TIFF file that triggers a buffer overflow . The TIFFRGBAImageGet function in LibTIFF 3.9.0 allows remote attackers to cause a denial of service via a TIFF file with an invalid combination of SamplesPerPixel and Photometric values . The TIFFVStripSize function in tif_strip.c in LibTIFF 3.9.0 and 3.9.2 makes incorrect calls to the TIFFGetField function, which allows remote attackers to cause a denial of service via a crafted TIFF image, related to downsampled OJPEG input and possibly related to a compiler optimization that triggers a divide-by-zero error . The TIFFExtractData macro in LibTIFF before 3.9.4 does not properly handle unknown tag types in TIFF directory entries, which allows remote attackers to cause a denial of service via a crafted TIFF file . Stack-based buffer overflow in the TIFFFetchSubjectDistance function in tif_dirread.c in LibTIFF before 3.9.4 allows remote attackers to cause a denial of service or possibly execute arbitrary code via a long EXIF SubjectDistance field in a TIFF file . tif_getimage.c in LibTIFF 3.9.0 and 3.9.2 on 64-bit platforms, as used in ImageMagick, does not properly perform vertical flips, which allows remote attackers to cause a denial of service or possibly execute arbitrary code via a crafted TIFF image, related to downsampled OJPEG input. LibTIFF 3.9.4 and earlier does not properly handle an invalid td_stripbytecount field, which allows remote attackers to cause a denial of service via a crafted TIFF file, a different vulnerability than CVE-2010-2443 . The updated packages have been patched to correct these issues.