7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0005 Low
EPSS
Percentile
14.5%
Out-of-bounds write in function vim_regsub_both at regexp.c:1954
git log
commit 5a8fad32ea9c075f045b37d6c7739891d458f82b (HEAD -> master, tag: v8.2.4962, origin/master, origin/HEAD)
./vim -u NONE -i NONE -n -m -X -Z -e -s -S /mnt/share/max/fuzz/poc/vim/poc_obw_s.dat -c :qa!
=================================================================
==19509==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x606000003175 at pc 0x000000485358 bp 0x7ffcbcc48210 sp 0x7ffcbcc479d0
WRITE of size 2 at 0x606000003175 thread T0
#0 0x485357 in strcpy (/home/fuzz/fuzz/vim/vim/src/vim+0x485357)
#1 0xce59a4 in vim_regsub_both /home/fuzz/fuzz/vim/vim/src/regexp.c:1954:3
#2 0xce9da3 in vim_regsub_multi /home/fuzz/fuzz/vim/vim/src/regexp.c:1897:14
#3 0x7ae5ad in ex_substitute /home/fuzz/fuzz/vim/vim/src/ex_cmds.c:4521:9
#4 0x7d7529 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#5 0x7c42e5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#6 0xe5191c in do_source_ext /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1674:5
#7 0xe4e376 in do_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1801:12
#8 0xe4dcac in cmd_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1174:14
#9 0xe4d38e in ex_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1200:2
#10 0x7d7529 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#11 0x7c42e5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#12 0x7c8f31 in do_cmdline_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:586:12
#13 0x1419502 in exe_commands /home/fuzz/fuzz/vim/vim/src/main.c:3108:2
#14 0x141569b in vim_main2 /home/fuzz/fuzz/vim/vim/src/main.c:780:2
#15 0x140ad95 in main /home/fuzz/fuzz/vim/vim/src/main.c:432:12
#16 0x7f9372ae2082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
#17 0x41ea6d in _start (/home/fuzz/fuzz/vim/vim/src/vim+0x41ea6d)
0x606000003175 is located 0 bytes to the right of 53-byte region [0x606000003140,0x606000003175)
allocated by thread T0 here:
#0 0x499ccd in malloc (/home/fuzz/fuzz/vim/vim/src/vim+0x499ccd)
#1 0x4cb3aa in lalloc /home/fuzz/fuzz/vim/vim/src/alloc.c:246:11
#2 0x4cb28a in alloc /home/fuzz/fuzz/vim/vim/src/alloc.c:151:12
#3 0x7ae273 in ex_substitute /home/fuzz/fuzz/vim/vim/src/ex_cmds.c:4486:24
#4 0x7d7529 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#5 0x7c42e5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#6 0xe5191c in do_source_ext /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1674:5
#7 0xe4e376 in do_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1801:12
#8 0xe4dcac in cmd_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1174:14
#9 0xe4d38e in ex_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1200:2
#10 0x7d7529 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#11 0x7c42e5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#12 0x7c8f31 in do_cmdline_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:586:12
#13 0x1419502 in exe_commands /home/fuzz/fuzz/vim/vim/src/main.c:3108:2
#14 0x141569b in vim_main2 /home/fuzz/fuzz/vim/vim/src/main.c:780:2
#15 0x140ad95 in main /home/fuzz/fuzz/vim/vim/src/main.c:432:12
#16 0x7f9372ae2082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/fuzz/fuzz/vim/vim/src/vim+0x485357) in strcpy
Shadow bytes around the buggy address:
0x0c0c7fff85d0: fa fa fa fa fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0c7fff85e0: fd fd fd fd fd fd fd fd fa fa fa fa 00 00 00 00
0x0c0c7fff85f0: 00 00 00 00 fa fa fa fa 00 00 00 00 00 00 00 00
0x0c0c7fff8600: fa fa fa fa 00 00 00 00 00 00 00 fa fa fa fa fa
0x0c0c7fff8610: 00 00 00 00 00 00 00 fa fa fa fa fa 00 00 00 00
=>0x0c0c7fff8620: 00 00 00 fa fa fa fa fa 00 00 00 00 00 00[05]fa
0x0c0c7fff8630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8640: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8650: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8660: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8670: 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
==19509==ABORTING
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0005 Low
EPSS
Percentile
14.5%