CVE-2021-4193

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 (Vi IMproved) is an updated and improved version of the vi editor.

Security Fix(es):

• vim: heap-based buffer overflow in win_redr_status() in drawscreen.c (CVE-2021-3872)

• vim: illegal memory access in find_start_brace() in cindent.c when C-indenting (CVE-2021-3984)

• vim: heap-based buffer overflow in find_help_tags() in help.c (CVE-2021-4019)

• vim: use-after-free in win_linetabsize() (CVE-2021-4192)

• vim: out-of-bound read in getvcol() (CVE-2021-4193)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

vim is vulnerable to Out-of-bounds Read

Vim (Vi IMproved) is an updated and improved version of the vi editor.

Security Fix(es):

• vim: heap-based buffer overflow in win_redr_status() in drawscreen.c (CVE-2021-3872)

• vim: illegal memory access in find_start_brace() in cindent.c when C-indenting (CVE-2021-3984)

• vim: heap-based buffer overflow in find_help_tags() in help.c (CVE-2021-4019)

• vim: use-after-free in win_linetabsize() (CVE-2021-4192)

• vim: out-of-bound read in getvcol() (CVE-2021-4193)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• CVE-2021-4192: fix using freed memory in /%V
• CVE-2021-4193: fix going beyond the end of the line with /%V

• CVE-2021-4192: fix using freed memory in /%V
• CVE-2021-4193: fix going beyond the end of the line with /%V

• SECURITY UPDATE: Using freed memory with /%V
  • debian/patches/CVE-2021-4192.patch: Get the line again after getvvcol()
  • CVE-2021-4192
• SECURITY UPDATE: Going beyond the end of the line with /%V
  • debian/patches/CVE-2021-4193.patch: Check for valid column in getvcol()
  • CVE-2021-4193

• CVE-2021-4019: replace the unbounded STRCPY pair in find_help_tags() with vim_snprintf bounded by IOSIZE to prevent heap buffer overflow with long :help arguments starting with "%_z@".
• CVE-2021-4192: re-fetch regline/reginput via reg_getline() after getvvcol() in reg_match_visual() so the cached line pointer cannot become a use-after-free when getvvcol flushes the line buffer.
• CVE-2021-4193: clamp pos->col to the first NUL in getvcol() so /%V searches cannot read past the end of the line.
• CVE-2022-1720: in get_visual_text(), drop a trailing NUL from non-mbyte selection length and guard the mbyte correction with *lenp > 0 so "gf" in Visual block mode does not read past the line.
• CVE-2022-2126: also require sp->ts_fidx > 0 before decrementing ts_fidx in the DIFF_INSERT branch of suggest_trie_walk() so spell suggestion cannot read before the start of the bad-word buffer.
• CVE-2022-2210: initialise off = 0 at the top of the deleted > 0 branch of diff_mark_adjust_tp() and only compute the real offset in the "5. delete lines at or just before top of diff" case, so a diff-block full-delete does not use a stale offset.
• CVE-2022-2285: place a NUL terminator at tp[len] before key-name matching in check_termcode() so crafted typeahead cannot be read past the end of the buffer.
• CVE-2022-2345: always vim_strsave(newsub) into reg_prev_sub in regtilde() and track an allocated regtilde result in sub_copy in do_sub() so a recursive :s cannot use freed memory.

• CVE-2021-4019: replace the unbounded STRCPY pair in find_help_tags() with vim_snprintf bounded by IOSIZE to prevent heap buffer overflow with long :help arguments starting with "%_z@".
• CVE-2021-4192: re-fetch regline/reginput via reg_getline() after getvvcol() in reg_match_visual() so the cached line pointer cannot become a use-after-free when getvvcol flushes the line buffer.
• CVE-2021-4193: clamp pos->col to the first NUL in getvcol() so /%V searches cannot read past the end of the line.
• CVE-2022-1720: in get_visual_text(), drop a trailing NUL from non-mbyte selection length and guard the mbyte correction with *lenp > 0 so "gf" in Visual block mode does not read past the line.
• CVE-2022-2126: also require sp->ts_fidx > 0 before decrementing ts_fidx in the DIFF_INSERT branch of suggest_trie_walk() so spell suggestion cannot read before the start of the bad-word buffer.
• CVE-2022-2210: initialise off = 0 at the top of the deleted > 0 branch of diff_mark_adjust_tp() and only compute the real offset in the "5. delete lines at or just before top of diff" case, so a diff-block full-delete does not use a stale offset.
• CVE-2022-2285: place a NUL terminator at tp[len] before key-name matching in check_termcode() so crafted typeahead cannot be read past the end of the buffer.
• CVE-2022-2345: always vim_strsave(newsub) into reg_prev_sub in regtilde() and track an allocated regtilde result in sub_copy in do_sub() so a recursive :s cannot use freed memory.

This update for vim fixes the following issues:

• CVE-2022-0318: Fixed heap-based buffer overflow (bsc#1195004).
• CVE-2021-3796: Fixed use-after-free in nv_replace() in normal.c (bsc#1190570).
• CVE-2021-3872: Fixed heap-based buffer overflow in win_redr_status() drawscreen.c (bsc#1191893).
• CVE-2021-3927: Fixed heap-based buffer overflow (bsc#1192481).
• CVE-2021-3928: Fixed stack-based buffer overflow (bsc#1192478).
• CVE-2021-4019: Fixed heap-based buffer overflow (bsc#1193294).
• CVE-2021-3984: Fixed illegal memory access when C-indenting could have led to heap buffer overflow (bsc#1193298).
• CVE-2021-3778: Fixed heap-based buffer overflow in regexp_nfa.c (bsc#1190533).
• CVE-2021-4193: Fixed out-of-bounds read (bsc#1194216).
• CVE-2021-46059: Fixed pointer dereference vulnerability via the vim_regexec_multi function at regexp.c (bsc#1194556).
• CVE-2022-0319: Fixded out-of-bounds read (bsc#1195066).
• CVE-2022-0351: Fixed uncontrolled recursion in eval7() (bsc#1195126).
• CVE-2022-0361: Fixed buffer overflow (bsc#1195126).
• CVE-2022-0413: Fixed use-after-free in src/ex_cmds.c (bsc#1195356).

This update for vim fixes the following issues:

• CVE-2022-0318: Fixed heap-based buffer overflow (bsc#1195004).
• CVE-2021-3796: Fixed use-after-free in nv_replace() in normal.c (bsc#1190570).
• CVE-2021-3872: Fixed heap-based buffer overflow in win_redr_status() drawscreen.c (bsc#1191893).
• CVE-2021-3927: Fixed heap-based buffer overflow (bsc#1192481).
• CVE-2021-3928: Fixed stack-based buffer overflow (bsc#1192478).
• CVE-2021-4019: Fixed heap-based buffer overflow (bsc#1193294).
• CVE-2021-3984: Fixed illegal memory access when C-indenting could have led to heap buffer overflow (bsc#1193298).
• CVE-2021-3778: Fixed heap-based buffer overflow in regexp_nfa.c (bsc#1190533).
• CVE-2021-4193: Fixed out-of-bounds read (bsc#1194216).
• CVE-2021-46059: Fixed pointer dereference vulnerability via the vim_regexec_multi function at regexp.c (bsc#1194556).
• CVE-2022-0319: Fixded out-of-bounds read (bsc#1195066).
• CVE-2022-0351: Fixed uncontrolled recursion in eval7() (bsc#1195126).
• CVE-2022-0361: Fixed buffer overflow (bsc#1195126).
• CVE-2022-0413: Fixed use-after-free in src/ex_cmds.c (bsc#1195356).

This update for vim fixes the following issues:

• CVE-2022-0318: Fixed heap-based buffer overflow (bsc#1195004).
• CVE-2021-3796: Fixed use-after-free in nv_replace() in normal.c (bsc#1190570).
• CVE-2021-3872: Fixed heap-based buffer overflow in win_redr_status() drawscreen.c (bsc#1191893).
• CVE-2021-3927: Fixed heap-based buffer overflow (bsc#1192481).
• CVE-2021-3928: Fixed stack-based buffer overflow (bsc#1192478).
• CVE-2021-4019: Fixed heap-based buffer overflow (bsc#1193294).
• CVE-2021-3984: Fixed illegal memory access when C-indenting could have led to heap buffer overflow (bsc#1193298).
• CVE-2021-3778: Fixed heap-based buffer overflow in regexp_nfa.c (bsc#1190533).
• CVE-2021-4193: Fixed out-of-bounds read (bsc#1194216).
• CVE-2021-46059: Fixed pointer dereference vulnerability via the vim_regexec_multi function at regexp.c (bsc#1194556).
• CVE-2022-0319: Fixded out-of-bounds read (bsc#1195066).
• CVE-2022-0351: Fixed uncontrolled recursion in eval7() (bsc#1195126).
• CVE-2022-0361: Fixed buffer overflow (bsc#1195126).
• CVE-2022-0413: Fixed use-after-free in src/ex_cmds.c (bsc#1195356).

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 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. (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 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. (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. 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…