Public bug reported:
# enviroment
ubuntu 18.04
./jhead poc
# version
3.04
# asan out
=================================================================
==33010==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6190000004e5 at pc 0x5618aeedc758 bp 0x7ffe61a1d410 sp 0x7ffe61a1d400
READ of size 1 at 0x6190000004e5 thread T0
#0 0x5618aeedc757 in Get16u exif.c:325
#1 0x5618aeef223e in ProcessGpsInfo gpsinfo.c:62
#2 0x5618aeee54d5 in ProcessExifDir exif.c:866
#3 0x5618aeee5529 in ProcessExifDir exif.c:852
#4 0x5618aeee695a in process_EXIF exif.c:1041
#5 0x5618aeed2382 in ReadJpegSections jpgfile.c:287
#6 0x5618aeed390e in ReadJpegSections jpgfile.c:126
#7 0x5618aeed390e in ReadJpegFile jpgfile.c:379
#8 0x5618aeec966c in ProcessFile jhead.c:905
#9 0x5618aeec4b2e in main jhead.c:1756
#10 0x7f9cfffb1bf6 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
#11 0x5618aeec7279 in _start (/home/fuzz/jhead-3.04/jhead+0x12279)
0x6190000004e5 is located 1 bytes to the right of 1124-byte region
[0x619000000080,0x6190000004e4)
allocated by thread T0 here:
#0 0x7f9d007fdb40 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
#1 0x5618aeed0d6b in ReadJpegSections jpgfile.c:173
SUMMARY: AddressSanitizer: heap-buffer-overflow exif.c:325 in Get16u
Shadow bytes around the buggy address:
0x0c327fff8040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fff8060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fff8070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c327fff8090: 00 00 00 00 00 00 00 00 00 00 00 00[04]fa fa fa
0x0c327fff80a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c327fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c327fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c327fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c327fff80e0: 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
==33010==ABORTING
** Affects: jhead (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "poc file"
https://bugs.launchpad.net/bugs/1921303/+attachment/5480697/+files/poc3
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https://bugs.launchpad.net/bugs/1921303
Title:
heap overflow
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