7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
30.9%
Out-of-bounds write in function vim_regsub_both at regexp.c:1954
git log
commit 4c3d21acaa09d929e6afe10288babe1d0af3de35 (HEAD -> master, tag: v8.2.5014, origin/master, origin/HEAD)
./vim -u NONE -i NONE -n -m -X -Z -e -s -S /mnt/share/max/fuzz/poc/vim/poc_obw2_s.dat -c :qa!
=================================================================
==3392181==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6060000030b5 at pc 0x000000485358 bp 0x7fffffff7330 sp 0x7fffffff6af0
WRITE of size 2 at 0x6060000030b5 thread T0
#0 0x485357 in strcpy (/home/fuzz/fuzz-vim/vim/src/vim+0x485357)
#1 0xceb704 in vim_regsub_both /home/fuzz/fuzz/vim/vim/src/regexp.c:1954:3
#2 0xcefb03 in vim_regsub_multi /home/fuzz/fuzz/vim/vim/src/regexp.c:1897:14
#3 0x7b3303 in ex_substitute /home/fuzz/fuzz/vim/vim/src/ex_cmds.c:4529:9
#4 0x7dc2e9 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#5 0x7c90a5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#6 0xe57b3c in do_source_ext /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1674:5
#7 0xe54596 in do_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1801:12
#8 0xe53ecc in cmd_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1174:14
#9 0xe535ae in ex_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1200:2
#10 0x7dc2e9 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#11 0x7c90a5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#12 0x7cdcf1 in do_cmdline_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:586:12
#13 0x1423d62 in exe_commands /home/fuzz/fuzz/vim/vim/src/main.c:3106:2
#14 0x141fefb in vim_main2 /home/fuzz/fuzz/vim/vim/src/main.c:780:2
#15 0x14155f5 in main /home/fuzz/fuzz/vim/vim/src/main.c:432:12
#16 0x7ffff7bec082 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)
0x6060000030b5 is located 0 bytes to the right of 53-byte region [0x606000003080,0x6060000030b5)
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 0x7b2f67 in ex_substitute /home/fuzz/fuzz/vim/vim/src/ex_cmds.c:4491:24
#4 0x7dc2e9 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#5 0x7c90a5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#6 0xe57b3c in do_source_ext /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1674:5
#7 0xe54596 in do_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1801:12
#8 0xe53ecc in cmd_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1174:14
#9 0xe535ae in ex_source /home/fuzz/fuzz/vim/vim/src/scriptfile.c:1200:2
#10 0x7dc2e9 in do_one_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:2567:2
#11 0x7c90a5 in do_cmdline /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:992:17
#12 0x7cdcf1 in do_cmdline_cmd /home/fuzz/fuzz/vim/vim/src/ex_docmd.c:586:12
#13 0x1423d62 in exe_commands /home/fuzz/fuzz/vim/vim/src/main.c:3106:2
#14 0x141fefb in vim_main2 /home/fuzz/fuzz/vim/vim/src/main.c:780:2
#15 0x14155f5 in main /home/fuzz/fuzz/vim/vim/src/main.c:432:12
#16 0x7ffff7bec082 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:
0x0c0c7fff85c0: fd fd fd fa fa fa fa fa fd fd fd fd fd fd fd fd
0x0c0c7fff85d0: fa fa fa fa 00 00 00 00 00 00 05 fa fa fa fa fa
0x0c0c7fff85e0: fd fd fd fd fd fd fd fd fa fa fa fa fd fd fd fd
0x0c0c7fff85f0: fd fd fd fd fa fa fa fa fd fd fd fd fd fd fd fd
0x0c0c7fff8600: fa fa fa fa fd fd fd fd fd fd fd fd fa fa fa fa
=>0x0c0c7fff8610: 00 00 00 00 00 00[05]fa fa fa fa fa fa fa fa fa
0x0c0c7fff8620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 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
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
==3392181==ABORTING
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
30.9%