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Created an attachment (id=767) [details] testcase on libtiff 4.0.7 The combineSeparateSamples16bits function in tiffcrop.c:3911 allows remote attackers to cause a denial of service (heap buffer overflow) via a crafted file. #tiffcrop $FILE out.tif ================================================================= ==25991==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61b00001f7b7 at pc 0x000000410343 bp 0x7fff0cafe240 sp 0x7fff0cafe238 READ of size 1 at 0x61b00001f7b7 thread T0 #0 0x410342 in combineSeparateSamples16bits /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:3911 #1 0x4156aa in readSeparateStripsIntoBuffer /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:4881 #2 0x41ebcb in loadImage /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:6175 #3 0x40a743 in main /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:2345 #4 0x7fca255e7b34 in __libc_start_main (/lib64/libc.so.6+0x21b34) #5 0x402e28 (/home/haojun/Downloads/testopensourcecode/tiff-4.0.7_build/bin/tiffcrop+0x402e28) 0x61b00001f7b7 is located 0 bytes to the right of 1591-byte region [0x61b00001f180,0x61b00001f7b7) allocated by thread T0 here: #0 0x7fca263dbbb8 in __interceptor_malloc ../../../../libsanitizer/asan/asan_malloc_linux.cc:62 #1 0x486286 in _TIFFmalloc /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/libtiff/tif_unix.c:316 #2 0x4150a2 in readSeparateStripsIntoBuffer /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:4821 #3 0x41ebcb in loadImage /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:6175 #4 0x40a743 in main /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:2345 #5 0x7fca255e7b34 in __libc_start_main (/lib64/libc.so.6+0x21b34) SUMMARY: AddressSanitizer: heap-buffer-overflow /home/haojun/Downloads/testopensourcecode/tiff-4.0.7/tools/tiffcrop.c:3911 in combineSeparateSamples16bits Shadow bytes around the buggy address: 0x0c367fffbea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffbeb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffbec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffbed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffbee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c367fffbef0: 00 00 00 00 00 00[07]fa fa fa fa fa fa fa fa fa 0x0c367fffbf00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffbf10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffbf20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffbf30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffbf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==25991==ABORTING testcase:https://github.com/bestshow/p0cs/blob/master/heap-buffer-overflow-combineSeparateSamples16bits-tiffcrop-3.tif
this looks to be a duplicate of 2621 Please check if all your reported bugs are a duplicate of existing bugs. Feel free to test also with newer 4.0.8
Bugzilla is no longer used for tracking libtiff issues. Remaining open tickets, such as this one, have been migrated to the libtiff GitLab instance at https://gitlab.com/libtiff/libtiff/issues . The migrated tickets have their summary prefixed with [BZ#XXXX] where XXXX is the initial Bugzilla issue number.
