Closed
Description
8b587f82559d919cb75395ff4508c4e1d21fe9e6.ctb.zip
Tested commit: b381efd
Credit: Henri Salo
Tools: american fuzzy lop 2.52b, afl-utils
Thanks to Kapsi internet-käyttäjät ry for providing valuable fuzzing resources.
I am more than happy to continue fuzzing this software after fixes has been applied. Thanks!
./lou_checktable 8b587f82559d919cb75395ff4508c4e1d21fe9e6.ctb
<snip>
=================================================================
==1606==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fff7fe53f40 at pc 0x7fe7a31fc7c9 bp 0x7fff7fe534d0 sp 0x7fff7fe534c8
WRITE of size 1 at 0x7fff7fe53f40 thread T0
#0 0x7fe7a31fc7c8 in includeFile /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:4560
#1 0x7fe7a31fc7c8 in compileRule /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:3196
#2 0x7fe7a32024ca in compileFile /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:4522
#3 0x7fe7a3203707 in compileTranslationTable /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:4627
#4 0x7fe7a3203707 in lou_getTable /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:4712
#5 0x564fd1060f33 in main /home/hsalo/src/liblouis/tools/lou_checktable.c:112
#6 0x7fe7a2e192e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0)
#7 0x564fd1061199 in _start (/home/hsalo/builds/liblouis/b381efd3248902ed2f9a797a46f79dfa0690a9c4/bin/lou_checktable+0x2199)
Address 0x7fff7fe53f40 is located in stack of thread T0 at offset 2528 in frame
#0 0x7fe7a31e3b9f in compileRule /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:3156
This frame has 17 object(s):
[32, 34) 'c'
[96, 98) 'c'
[160, 164) 'lastToken'
[224, 228) 'after'
[288, 292) 'before'
[352, 356) 'holdOffset'
[416, 432) 'dict'
[480, 2528) 'includeThis' <== Memory access at offset 2528 overflows this variable
[2560, 6658) 'token'
[6720, 10818) 'ruleChars'
[10880, 14978) 'ruleDots'
[15040, 19138) 'name'
[19200, 23298) 'ruleChars'
[23360, 27458) 'ruleDots'
[27520, 31618) 'upperDots'
[31680, 35778) 'lowerDots'
[35840, 39984) 'nested'
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow /home/hsalo/src/liblouis/liblouis/compileTranslationTable.c:4560 in includeFile
Shadow bytes around the buggy address:
0x10006ffc2790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc27a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc27b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc27c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc27d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10006ffc27e0: 00 00 00 00 00 00 00 00[f2]f2 f2 f2 00 00 00 00
0x10006ffc27f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc2800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc2810: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc2820: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10006ffc2830: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==1606==ABORTING