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
44.1%
Heap-based Buffer Overflow in function get_lisp_indent at indent.c:1994
git log
commit 83497f875881973df772cc4cc593766345df6c4a (HEAD -> master, tag: v8.2.5105, origin/master, origin/HEAD)
./vim -u NONE -i NONE -n -m -X -Z -e -s -S /mnt/share/max/fuzz/poc/vim/poc_hbo2_s.dat -c :qa!
=================================================================
==2361==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x621000013d00 at pc 0x0000009a0535 bp 0x7ffcbe3e9ab0 sp 0x7ffcbe3e9aa8
READ of size 1 at 0x621000013d00 thread T0
#0 0x9a0534 in get_lisp_indent /home/fuzz/fuzz/vim/afl/src/indent.c:1994:36
#1 0x99f221 in op_reindent /home/fuzz/fuzz/vim/afl/src/indent.c:1101:16
#2 0xbb091d in do_pending_operator /home/fuzz/fuzz/vim/afl/src/ops.c:4057:7
#3 0xb1fa03 in normal_cmd /home/fuzz/fuzz/vim/afl/src/normal.c:961:2
#4 0x814eee in exec_normal /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:8808:6
#5 0x814718 in exec_normal_cmd /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:8771:5
#6 0x8142c9 in ex_normal /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:8689:6
#7 0x7dd249 in do_one_cmd /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:2570:2
#8 0x7ca105 in do_cmdline /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:992:17
#9 0xe58b5e in do_source_ext /home/fuzz/fuzz/vim/afl/src/scriptfile.c:1674:5
#10 0xe555f6 in do_source /home/fuzz/fuzz/vim/afl/src/scriptfile.c:1801:12
#11 0xe54f33 in cmd_source /home/fuzz/fuzz/vim/afl/src/scriptfile.c:1174:14
#12 0xe5463e in ex_source /home/fuzz/fuzz/vim/afl/src/scriptfile.c:1200:2
#13 0x7dd249 in do_one_cmd /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:2570:2
#14 0x7ca105 in do_cmdline /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:992:17
#15 0x7ced81 in do_cmdline_cmd /home/fuzz/fuzz/vim/afl/src/ex_docmd.c:586:12
#16 0x1422702 in exe_commands /home/fuzz/fuzz/vim/afl/src/main.c:3133:2
#17 0x141e89b in vim_main2 /home/fuzz/fuzz/vim/afl/src/main.c:780:2
#18 0x1413dad in main /home/fuzz/fuzz/vim/afl/src/main.c:432:12
#19 0x7fe23555b082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
#20 0x41ea4d in _start (/home/fuzz/fuzz/vim/afl/src/vim+0x41ea4d)
0x621000013d00 is located 0 bytes to the right of 4096-byte region [0x621000012d00,0x621000013d00)
allocated by thread T0 here:
#0 0x499cad in malloc (/home/fuzz/fuzz/vim/afl/src/vim+0x499cad)
#1 0x4cb382 in lalloc /home/fuzz/fuzz/vim/afl/src/alloc.c:246:11
#2 0x4cb26a in alloc /home/fuzz/fuzz/vim/afl/src/alloc.c:151:12
#3 0x142bfb5 in mf_alloc_bhdr /home/fuzz/fuzz/vim/afl/src/memfile.c:884:21
#4 0x142adc7 in mf_new /home/fuzz/fuzz/vim/afl/src/memfile.c:375:26
#5 0xa60d28 in ml_new_data /home/fuzz/fuzz/vim/afl/src/memline.c:4080:15
#6 0xa5f6d1 in ml_open /home/fuzz/fuzz/vim/afl/src/memline.c:394:15
#7 0x501c8a in open_buffer /home/fuzz/fuzz/vim/afl/src/buffer.c:186:9
#8 0x141ff4c in create_windows /home/fuzz/fuzz/vim/afl/src/main.c:2902:9
#9 0x141e21a in vim_main2 /home/fuzz/fuzz/vim/afl/src/main.c:711:5
#10 0x1413dad in main /home/fuzz/fuzz/vim/afl/src/main.c:432:12
#11 0x7fe23555b082 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/afl/src/indent.c:1994:36 in get_lisp_indent
Shadow bytes around the buggy address:
0x0c427fffa750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffa760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffa770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffa780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffa790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fffa7a0:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffa7b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffa7c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffa7d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffa7e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffa7f0: 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
==2361==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
44.1%