Stack smashing detected and SIGABRT during finding of best embedding #9
Description
This bug was taken from Debian[1].
[1] https://bugs.debian.org/1037481
From: Björn Wiberg bjorn.wiberg@outlook.com
To: Debian Bug Tracking System submit@bugs.debian.org
Subject: outguess: Stack smashing detected and SIGABRT during finding of best embedding
Date: Tue, 13 Jun 2023 12:30:40 +0200
Package: outguess
Version: 1:0.4-2
Severity: important
Hello,
When trying to run OutGuess on Debian 12, I get a "stack smashing detected" error message and the program is aborted (SIGABRT).
This appears to happen for all JPEG images, i.e. it is not triggered by a certain image.
Steps to reproduce:
$ wget -q https://upload.wikimedia.org/wikipedia/commons/3/3f/JPEG_example_flower.jpg
$ echo msg1 > msg1.txt
$ echo msg2 > msg2.txt
$ outguess -k "key1" -d msg1.txt -E -K "key2" -D msg2.txt -p 100 JPEG_example_flower.jpg JPEG_example_flower.steg.jpg
Initialize encoding/decoding tables
Reading JPEG_example_flower.jpg....
JPEG compression quality set to 100
Extracting usable bits: 70325 bits
Correctable message size: 17434 bits, 24.79%
Encoded 'msg1.txt': 40 bits, 5 bytes
Finding best embedding...
0: 33(45.8%)[82.5%], bias 28(0.85), saved: -1, total: 0.05%
1: 28(38.9%)[70.0%], bias 25(0.89), saved: -1, total: 0.04%
6: 30(42.3%)[75.0%], bias 19(0.63), saved: -1, total: 0.04%
11: 28(38.9%)[70.0%], bias 13(0.46), saved: -1, total: 0.04%
11, 41: Embedding data: 40 in 70325
Bits embedded: 72, changed: 28(38.9%)[70.0%], bias: 13, tot: 68673, skip: 68601
Encoded 'msg2.txt' with ECC: 96 bits, 12 bytes
Finding best embedding...
*** stack smashing detected ***: terminated
Aborted
A GDB session shows the following (nothing new):
$ gdb --args outguess -k "key1" -d msg1.txt -E -K "key2" -D msg2.txt -p 100 JPEG_example_flower.jpg JPEG_example_flower.steg.jpg
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Reading symbols from outguess...
(No debugging symbols found in outguess)
(gdb) run
Starting program: /usr/bin/outguess -k key1 -d msg1.txt -E -K key2 -D msg2.txt -p 100 JPEG_example_flower.jpg JPEG_example_flower.steg.jpg
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Initialize encoding/decoding tables
Reading JPEG_example_flower.jpg....
JPEG compression quality set to 100
Extracting usable bits: 70325 bits
Correctable message size: 17434 bits, 24.79%
Encoded 'msg1.txt': 40 bits, 5 bytes
Finding best embedding...
0: 33(45.8%)[82.5%], bias 28(0.85), saved: -1, total: 0.05%
1: 28(38.9%)[70.0%], bias 25(0.89), saved: -1, total: 0.04%
6: 30(42.3%)[75.0%], bias 19(0.63), saved: -1, total: 0.04%
11: 28(38.9%)[70.0%], bias 13(0.46), saved: -1, total: 0.04%
11, 41: Embedding data: 40 in 70325
Bits embedded: 72, changed: 28(38.9%)[70.0%], bias: 13, tot: 68673, skip: 68601
Encoded 'msg2.txt' with ECC: 96 bits, 12 bytes
Finding best embedding...
*** stack smashing detected ***: terminated
Program received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44
44 ./nptl/pthread_kill.c: No such file or directory.
(gdb) bt full
#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44
tid = <optimized out>
ret = 0
pd = <optimized out>
old_mask = {__val = {0}}
ret = <optimized out>
#1 0x00007ffff7d83d2f in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
No locals.
#2 0x00007ffff7d34ef2 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
ret = <optimized out>
#3 0x00007ffff7d1f472 in __GI_abort () at ./stdlib/abort.c:79
save_stage = 1
act = {__sigaction_handler = {sa_handler = 0x20, sa_sigaction = 0x20}, sa_mask = {__val = {140737351587994, 17179869190, 8589934656, 140737488344528, 8589939592, 6848, 93824992358358, 1431883968, 1, 1706640, 0, 93824992485456, 93824992754952, 140737488344528, 93824992485384, 93824992485744}}, sa_flags = 1431738664, sa_restorer = 0x8}
#4 0x00007ffff7d782d0 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff7e92210 "*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:155
ap = {{gp_offset = 24, fp_offset = 247, overflow_arg_area = 0x7fffffffd050, reg_save_area = 0x7fffffffcfe0}}
fd = <optimized out>
list = <optimized out>
nlist = <optimized out>
cp = <optimized out>
#5 0x00007ffff7e10e82 in __GI___fortify_fail (msg=msg@entry=0x7ffff7e921f8 "stack smashing detected") at ./debug/fortify_fail.c:26
No locals.
#6 0x00007ffff7e10e60 in __stack_chk_fail () at ./debug/stack_chk_fail.c:24
No locals.
#7 0x0000555555557422 in ?? ()
No symbol table info available.
#8 0x00005555555574ba in ?? ()
No symbol table info available.
#9 0x0000555555557aa8 in ?? ()
No symbol table info available.
#10 0x0000555555557e44 in ?? ()
No symbol table info available.
#11 0x0000555555558a04 in ?? ()
No symbol table info available.
#12 0x0000555555556d12 in ?? ()
No symbol table info available.
#13 0x00007ffff7d2018a in __libc_start_call_main (main=main@entry=0x5555555562e0, argc=argc@entry=14, argv=argv@entry=0x7fffffffe158) at ../sysdeps/nptl/libc_start_call_main.h:58
self = <optimized out>
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737488347480, 4746325038488689852, 0, 140737488347600, 93824992401496, 140737354125344, -4746325037838689092, -4746307070948467524}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7fffffffe158, 0x7fffffffe158}, data = {prev = 0x0, cleanup = 0x0, canceltype = -7848}}}
not_first_call = <optimized out>
#14 0x00007ffff7d20245 in __libc_start_main_impl (main=0x5555555562e0, argc=14, argv=0x7fffffffe158, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe148) at ../csu/libc-start.c:381
No locals.
#15 0x0000555555556f81 in ?? ()
No symbol table info available.
(gdb) quit
A debugging session is active.
Inferior 1 [process 187740] will be killed.
Quit anyway? (y or n) y
$
Best regards
Björn