CVE-2021-4166

vim is vulnerable to Out-of-bounds Read

vim is vulnerable to Out-of-bounds Read

Vim is an advanced text editor that seeks to provide the power of the de-facto Unix editor 'Vi', with a more complete feature set. Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Security Fix(es):

vim is vulnerable to Out-of-bounds Read.(CVE-2021-4166)

vim is vulnerable to Out-of-bounds Read.(CVE-2021-4193)

vim is vulnerable to Use After Free.(CVE-2021-4192)

vim is vulnerable to Out-of-bounds Read

• CVE-2022-0572: heap overflow on vcol-overflow in :retab (upstream vim 8.2.4359)
• CVE-2022-0368: illegal memory access when undo makes Visual area invalid (upstream vim 8.2.4217)
• CVE-2022-0685: crash on multi-byte char in unix_expandpath() (upstream vim 8.2.4418)
• CVE-2022-2125: heap overflow in get_lisp_indent() (upstream vim 8.2.5122)
• CVE-2022-2183: reading past end-of-line in lisp indenting (upstream vim 8.2.5151)
• CVE-2022-2124: reading past end-of-line in current_quote() (upstream vim 8.2.5120)
• CVE-2022-2344: heap overflow in ins_compl_add() (upstream vim 9.0.0046)
• CVE-2022-3256: use-after-free in movemark() when autocmd changes mark (upstream vim 9.0.0530)
• CVE-2023-4752: heap use-after-free in ins_compl_get_exp() (upstream vim 9.0.1858)
• CVE-2022-2126: spell-suggest read past bad word (upstream vim 8.2.5123)
• CVE-2022-2946: use-after-free in do_tag() when tagfunc invalidates tagstack (upstream vim 9.0.0246)
• CVE-2022-1720: OOB read in get_visual_text() (upstream vim 8.2.4956)
• CVE-2022-3234: OOB write in op_replace() (upstream vim 9.0.0483)
• CVE-2023-0433: same_leader() read past end-of-line on short comment line (upstream vim 9.0.1225)
• CVE-2023-4781: heap-buffer-overflow in vim_regsub_both() via nmatch underflow in :substitute, plus textlock guard in win_exchange() (upstream vim 9.0.1873)
• CVE-2022-0351: crash on deeply nested expression (upstream vim 8.2.4206)
• CVE-2022-2175: new_cmdpos leak across register insertion in getcmdline() (upstream vim 8.2.5148)
• CVE-2026-39881: netbeans command injection via crafted sign/highlight identifier + special-keys (upstream vim 9.2.0316)
• CVE-2021-4166: heap-buffer-overflow when clearing the argument list while it is being used (upstream vim 8.2.3884, with 8.2.2421 + 8.2.2463 prereqs for arglist_locked plumbing)
• CVE-2022-2343: heap-buffer-overflow in ins_compl_add_infercase() on long line with 'infercase' (upstream vim 9.0.0045)
• CVE-2022-3296: stack underflow in ex_finally / ex_endtry when :finally lacks an enclosing :try (upstream vim 9.0.0577)

• SECURITY UPDATE: crash when clearing the argument list while using it
  • debian/patches/CVE-2021-4166.patch: lock the argument list for ":all"; matches upstream patch 8.2.3884.
  • CVE-2021-4166
• SECURITY UPDATE: reading past end of completion with a long line
  • debian/patches/CVE-2022-2343.patch: build the inferred-case text in a growarray when it outgrows IObuff; matches upstream patch 9.0.0045.
  • CVE-2022-2343
• SECURITY UPDATE: memory access errors when calling setloclist() in an autocommand
  • debian/patches/CVE-2022-3016.patch: give an error if the list was changed unexpectedly and drop the stale pointer instead of storing it back; matches upstream patches 8.2.1677 and 9.0.0286.
  • CVE-2022-3016
• SECURITY UPDATE: SpellFileMissing autocmd may delete buffer
  • debian/patches/CVE-2022-3352.patch: disallow deleting the current buffer while loading a spell file; matches upstream patch 9.0.0614.
  • CVE-2022-3352
• SECURITY UPDATE: filetype autocmd may cause freed memory access
  • debian/patches/CVE-2022-3705.patch: set the quickfix-busy flag while filling the buffer; matches upstream patch 9.0.0805.
  • CVE-2022-3705
• SECURITY UPDATE: invalid memory access in substitute with function
  • debian/patches/CVE-2022-4141.patch: check for text or buffer being locked before jumping to a file; matches upstream patch 9.0.0947.
  • CVE-2022-4141

CWE-122 Heap-based Buffer Overflow (CVE-2021-4136) CWE-125 Out-of-bounds Read (CVE-2021-4166) CWE-416 Use After Free (CVE-2021-4173) CWE-416 Use After Free (CVE-2021-4187)

This update for vim fixes the following issues:

• CVE-2017-17087: Fixed information leak via .swp files (bsc#1070955).
• CVE-2021-3875: Fixed heap-based buffer overflow (bsc#1191770).
• CVE-2021-3903: Fixed heap-based buffer overflow (bsc#1192167).
• CVE-2021-3968: Fixed heap-based buffer overflow (bsc#1192902).
• CVE-2021-3973: Fixed heap-based buffer overflow (bsc#1192903).
• CVE-2021-3974: Fixed use-after-free (bsc#1192904).
• CVE-2021-4069: Fixed use-after-free in ex_open()in src/ex_docmd.c (bsc#1193466).
• CVE-2021-4136: Fixed heap-based buffer overflow (bsc#1193905).
• CVE-2021-4166: Fixed out-of-bounds read (bsc#1194093).
• CVE-2021-4192: Fixed use-after-free (bsc#1194217).
• CVE-2021-4193: Fixed out-of-bounds read (bsc#1194216).
• CVE-2022-0128: Fixed out-of-bounds read (bsc#1194388).
• CVE-2022-0213: Fixed heap-based buffer overflow (bsc#1194885).
• CVE-2022-0261: Fixed heap-based buffer overflow (bsc#1194872).
• CVE-2022-0318: Fixed heap-based buffer overflow (bsc#1195004).
• CVE-2022-0359: Fixed heap-based buffer overflow in init_ccline() in ex_getln.c (bsc#1195203).
• CVE-2022-0392: Fixed heap-based buffer overflow (bsc#1195332).
• CVE-2022-0407: Fixed heap-based buffer overflow (bsc#1195354).
• CVE-2022-0696: Fixed NULL pointer dereference (bsc#1196361).
• CVE-2022-1381: Fixed global heap buffer overflow in skip_range (bsc#1198596).
• CVE-2022-1420: Fixed out-of-range pointer offset (bsc#1198748).
• CVE-2022-1616: Fixed use-after-free in append_command (bsc#1199331).
• CVE-2022-1619: Fixed heap-based Buffer Overflow in function cmdline_erase_chars (bsc#1199333).
• CVE-2022-1620: Fixed NULL pointer dereference in function vim_regexec_string (bsc#1199334).
• CVE-2022-1733: Fixed heap-based buffer overflow in cindent.c (bsc#1199655).
• CVE-2022-1735: Fixed heap-based buffer overflow (bsc#1199651).
• CVE-2022-1771: Fixed stack exhaustion (bsc#1199693).
• CVE-2022-1785: Fixed out-of-bounds write (bsc#1199745).
• CVE-2022-1796: Fixed use-after-free in find_pattern_in_path (bsc#1199747).
• CVE-2022-1851: Fixed out-of-bounds read (bsc#1199936).
• CVE-2022-1897: Fixed out-of-bounds write (bsc#1200010).
• CVE-2022-1898: Fixed use-after-free (bsc#1200011).
• CVE-2022-1927: Fixed buffer over-read (bsc#1200012).

This update for vim fixes the following issues:

Updated to version 9.0.0814:

• Fixing bsc#1192478 VUL-1: CVE-2021-3928: vim: vim is vulnerable to Stack-based Buffer Overflow
• Fixing bsc#1203508 VUL-0: CVE-2022-3234: vim: Heap-based Buffer Overflow prior to 9.0.0483.
• Fixing bsc#1203509 VUL-1: CVE-2022-3235: vim: Use After Free in GitHub prior to 9.0.0490.
• Fixing bsc#1203820 VUL-0: CVE-2022-3324: vim: Stack-based Buffer Overflow in prior to 9.0.0598.
• Fixing bsc#1204779 VUL-0: CVE-2022-3705: vim: use after free in function qf_update_buffer of the file quickfix.c
• Fixing bsc#1203152 VUL-1: CVE-2022-2982: vim: use after free in qf_fill_buffer()
• Fixing bsc#1203796 VUL-1: CVE-2022-3296: vim: stack out of bounds read in ex_finally() in ex_eval.c
• Fixing bsc#1203797 VUL-1: CVE-2022-3297: vim: use-after-free in process_next_cpt_value() at insexpand.c
• Fixing bsc#1203110 VUL-1: CVE-2022-3099: vim: Use After Free in ex_docmd.c
• Fixing bsc#1203194 VUL-1: CVE-2022-3134: vim: use after free in do_tag()
• Fixing bsc#1203272 VUL-1: CVE-2022-3153: vim: NULL Pointer Dereference in GitHub repository vim/vim prior to 9.0.0404.
• Fixing bsc#1203799 VUL-1: CVE-2022-3278: vim: NULL pointer dereference in eval_next_non_blank() in eval.c
• Fixing bsc#1203924 VUL-1: CVE-2022-3352: vim: vim: use after free
• Fixing bsc#1203155 VUL-1: CVE-2022-2980: vim: null pointer dereference in do_mouse()
• Fixing bsc#1202962 VUL-1: CVE-2022-3037: vim: Use After Free in vim prior to 9.0.0321
• Fixing bsc#1200884 Vim: Error on startup
• Fixing bsc#1200902 VUL-0: CVE-2022-2183: vim: Out-of-bounds Read through get_lisp_indent() Mon 13:32
• Fixing bsc#1200903 VUL-0: CVE-2022-2182: vim: Heap-based Buffer Overflow through parse_cmd_address() Tue 08:37
• Fixing bsc#1200904 VUL-0: CVE-2022-2175: vim: Buffer Over-read through cmdline_insert_reg() Tue 08:37
• Fixing bsc#1201249 VUL-0: CVE-2022-2304: vim: stack buffer overflow in spell_dump_compl()
• Fixing bsc#1201356 VUL-1: CVE-2022-2343: vim: Heap-based Buffer Overflow in GitHub repository vim prior to 9.0.0044
• Fixing bsc#1201359 VUL-1: CVE-2022-2344: vim: Another Heap-based Buffer Overflow vim prior to 9.0.0045
• Fixing bsc#1201363 VUL-1: CVE-2022-2345: vim: Use After Free in GitHub repository vim prior to 9.0.0046.
• Fixing bsc#1201620 vim: SLE-15-SP4-Full-x86_64-GM-Media1 and vim-plugin-tlib-1.27-bp154.2.18.noarch issue
• Fixing bsc#1202414 VUL-1: CVE-2022-2819: vim: Heap-based Buffer Overflow in compile_lock_unlock()
• Fixing bsc#1202552 VUL-1: CVE-2022-2874: vim: NULL Pointer Dereference in generate_loadvar()
• Fixing bsc#1200270 VUL-1: CVE-2022-1968: vim: use after free in utf_ptr2char
• Fixing bsc#1200697 VUL-1: CVE-2022-2124: vim: out of bounds read in current_quote()
• Fixing bsc#1200698 VUL-1: CVE-2022-2125: vim: out of bounds read in get_lisp_indent()
• Fixing bsc#1200700 VUL-1: CVE-2022-2126: vim: out of bounds read in suggest_trie_walk()
• Fixing bsc#1200701 VUL-1: CVE-2022-2129: vim: out of bounds write in vim_regsub_both()
• Fixing bsc#1200732 VUL-1: CVE-2022-1720: vim: out of bounds read in grab_file_name()
• Fixing bsc#1201132 VUL-1: CVE-2022-2264: vim: out of bounds read in inc()
• Fixing bsc#1201133 VUL-1: CVE-2022-2284: vim: out of bounds read in utfc_ptr2len()
• Fixing bsc#1201134 VUL-1: CVE-2022-2285: vim: negative size passed to memmove() due to integer overflow
• Fixing bsc#1201135 VUL-1: CVE-2022-2286: vim: out of bounds read in ins_bytes()
• Fixing bsc#1201136 VUL-1: CVE-2022-2287: vim: out of bounds read in suggest_trie_walk()
• Fixing bsc#1201150 VUL-1: CVE-2022-2231: vim: null pointer dereference skipwhite()
• Fixing bsc#1201151 VUL-1: CVE-2022-2210: vim: out of bounds read in ml_append_int()
• Fixing bsc#1201152 VUL-1: CVE-2022-2208: vim: null pointer dereference in diff_check()
• Fixing bsc#1201153 VUL-1: CVE-2022-2207: vim: out of bounds read in ins_bs()
• Fixing bsc#1201154 VUL-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. (CVE-2021-4166)

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. (CVE-2021-4192)

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. This issue only affected Ubuntu 14.04 ESM, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-4193)

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. (CVE-2022-0213)

It was discovered that Vim was incorrectly performing read and write operations when in visual block mode, going beyond the end of a line and causing a heap buffer overflow. 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 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-0261, CVE-2022-0318)

It was discovered that Vim was incorrectly handling window exchanging operations when in Visual mode, which could result in an out-of-bounds read. An attacker could possibly use this issue to expose sensitive information. (CVE-2022-0319)

It was discovered that Vim was incorrectly handling recursion when parsing conditional expressions. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2022-0351)

It was discovered that Vim was not properly handling memory allocation when processing data in Ex mode, 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. (CVE-2022-0359)

It was discovered that Vim was not properly performing bounds checks when executing line operations in Visual mode, 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. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-0361, CVE-2022-0368)

It was discovered that Vim was not properly handling loop conditions when looking for spell suggestions, which could result in a stack buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2022-0408)

It was discovered that Vim was incorrectly handling memory access when executing buffer operations, which could result in the usage of freed memory. An attacker could possibly use this issue to execute arbitrary code. (CVE-2022-0443)

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. (CVE-2022-0554)

It was discovered that Vim was not properly performing bounds checks for column numbers when replacing tabs with spaces or spaces with tabs, which could cause a heap buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2022-0572)

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…