Public bug reported: # enviroment ubuntu 18.04 ./jhead poc
# version 3.04 # asan out ================================================================= ==27663==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61d000000a08 at pc 0x562527b27ea8 bp 0x7ffe2a994bb0 sp 0x7ffe2a994ba0 READ of size 1 at 0x61d000000a08 thread T0 #0 0x562527b27ea7 in ProcessGpsInfo gpsinfo.c:126 #1 0x562527b194d5 in ProcessExifDir exif.c:866 #2 0x562527b1a95a in process_EXIF exif.c:1041 #3 0x562527b06382 in ReadJpegSections jpgfile.c:287 #4 0x562527b0790e in ReadJpegSections jpgfile.c:126 #5 0x562527b0790e in ReadJpegFile jpgfile.c:379 #6 0x562527afd66c in ProcessFile jhead.c:905 #7 0x562527af8b2e in main jhead.c:1756 #8 0x7f3c2ea7fbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #9 0x562527afb279 in _start (/home/fuzz/jhead-3.04/jhead+0x12279) 0x61d000000a08 is located 66 bytes to the right of 2374-byte region [0x61d000000080,0x61d0000009c6) allocated by thread T0 here: #0 0x7f3c2f2cbb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40) #1 0x562527b04d6b in ReadJpegSections jpgfile.c:173 SUMMARY: AddressSanitizer: heap-buffer-overflow gpsinfo.c:126 in ProcessGpsInfo Shadow bytes around the buggy address: 0x0c3a7fff80f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fff8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fff8110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fff8120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fff8130: 00 00 00 00 00 00 00 00 06 fa fa fa fa fa fa fa =>0x0c3a7fff8140: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fff8150: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fff8160: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fff8170: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fff8180: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fff8190: 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 Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 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 ==27663==ABORTING ** Affects: jhead (Ubuntu) Importance: Undecided Status: New ** Attachment added: "poc5" https://bugs.launchpad.net/bugs/1921305/+attachment/5480703/+files/poc5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1921305 Title: heap overflow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jhead/+bug/1921305/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs