Public bug reported:
# enviroment
ubuntu 18.04
./jhead poc
# version
3.04
# asan out
=================================================================
==34259==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x611000000106 at pc 0x55e0a14147a5 bp 0x7ffcd8d72e80 sp 0x7ffcd8d72e70
READ of size 1 at 0x611000000106 thread T0
#0 0x55e0a14147a4 in show_IPTC iptc.c:136
#1 0x55e0a13ec8bb in ProcessFile jhead.c:955
#2 0x55e0a13e7b2e in main jhead.c:1756
#3 0x7fa81c777bf6 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
#4 0x55e0a13ea279 in _start (/home/fuzz/jhead-3.04/jhead+0x12279)
0x611000000106 is located 0 bytes to the right of 198-byte region
[0x611000000040,0x611000000106)
allocated by thread T0 here:
#0 0x7fa81cfc3b40 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
#1 0x55e0a13f3d6b in ReadJpegSections jpgfile.c:173
SUMMARY: AddressSanitizer: heap-buffer-overflow iptc.c:136 in show_IPTC
Shadow bytes around the buggy address:
0x0c227fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c227fff8000: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c227fff8010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c227fff8020:[06]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c227fff8070: 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
==34259==ABORTING
** Affects: jhead (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "poc file"
https://bugs.launchpad.net/bugs/1921301/+attachment/5480683/+files/poc1
** Information type changed from Private Security to Public
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https://bugs.launchpad.net/bugs/1921301
Title:
heap overflow
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