Amazon Linux 2023 : vim-common, vim-data, vim-default-editor (ALAS2023-2026-1862)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2026-1862.
##

include('compat.inc');

if (description)
{
  script_id(322106);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/26");

  script_cve_id(
    "CVE-2026-35177",
    "CVE-2026-39881",
    "CVE-2026-42307",
    "CVE-2026-43961",
    "CVE-2026-44656",
    "CVE-2026-45130",
    "CVE-2026-46483",
    "CVE-2026-47162",
    "CVE-2026-47167",
    "CVE-2026-52858",
    "CVE-2026-52859",
    "CVE-2026-52860"
  );
  script_xref(name:"IAVA", value:"2026-A-0619");

  script_name(english:"Amazon Linux 2023 : vim-common, vim-data, vim-default-editor (ALAS2023-2026-1862)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1862 advisory.

    Vim is an open source, command line text editor. Prior to 9.2.0280, a path traversal bypass in Vim's
    zip.vim plugin allows overwriting of arbitrary files when opening specially crafted zip archives,
    circumventing the previous fix for CVE-2025-53906. This vulnerability is fixed in 9.2.0280.
    (CVE-2026-35177)

    Ex command injection in Vim's NetBeans integration before v9.2.0316. The netbeans defineAnnoType command
    passes typeName, fg and bg unsanitized to coloncmd(), allowing a malicious NetBeans server to inject
    arbitrary Ex commands via '|'. Similarly, specialKeys does not validate key tokens before building a map
    command. (CVE-2026-39881)

    Vim is an open source, command line text editor. Prior to version 9.2.0383, an OS command injection
    vulnerability exists in the netrw standard plugin bundled with Vim. By inducing a user to open a crafted
    URL (e.g., using the sftp:// or file:// protocol handlers), an attacker can execute arbitrary shell
    commands with the privileges of the Vim process. This issue has been patched in version 9.2.0383.
    (CVE-2026-42307)

    A Vimscript code injection vulnerability exists in `s:NetrwMarkFile()` in thenetrw plugin
    (`runtime/pack/dist/opt/netrw/autoload/netrw.vim`) whenunmarking files from the global marked-file list.
    A filename derivedfrom the buffer's directory listing is interpolated into a stringexpression passed to
    `filter()`, allowing a crafted filename containinga double quote to break out of the quoted string literal
    and executearbitrary Vimscript, including shell commands via `execute()` and `:!`.

    ## Description`s:NetrwMarkFile()` maintains two marked-file lists: a buffer-local listand a global list.
    When a file is unmarked, both lists are updated.The buffer-local list uses the safe pattern:

    call filter(s:netrwmarkfilelist_{curbufnr},'v:val != a:fname')

    where `a:fname` is referenced as a variable inside the filter expressionand resolved at evaluation time.
    The global list, however, interpolatedthe filename's value directly into the expression string:

    let dname = netrw#fs#ComposePath(b:netrw_curdir, a:fname)...call filter(s:netrwmarkfilelist, 'v:val !=
    '.dname.'')

    When `filter()` receives a string argument, the string is parsed as aVimscript expression.  A filename
    containing `` terminates the quotedliteral early, after which the remainder of the filename is evaluated
    asVimscript.  Calls such as `execute(!cmd)` inside the injected fragmentrun arbitrary Ex commands with
    the privileges of the user running Vim.The filename reaches `s:NetrwMarkFile()` through the `mf` mapping,
    whichcalls `s:NetrwGetWord()` to read the filename from the current line ofthe netrw directory listing.
    The injection only triggers on the second`mf` press for a given entry, because the first press takes
    the`add()` branch and only the second takes the vulnerable `filter()`branch. (CVE-2026-43961)

    Vim is an open source, command line text editor. Prior to version 9.2.0435, an OS command injection
    vulnerability exists in Vim's :find command-line completion. When the path option contains backtick-
    enclosed shell commands, those commands are executed during file name completion. Because the path option
    lacks the P_SECURE flag, it can be set from a modeline, allowing an attacker who controls the contents of
    a file to execute arbitrary shell commands when the user opens that file in Vim and triggers :find
    completion. This issue has been patched in version 9.2.0435. (CVE-2026-44656)

    Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists
    in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active.
    An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer
    multiplication, causing a small buffer to be allocated for a write loop that runs many iterations,
    overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can
    trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has
    been patched in version 9.2.0450. (CVE-2026-45130)

    Vim is an open source, command line text editor. Prior to 9.2.0479, a command injection vulnerability
    exists in tar#Vimuntar() inruntime/autoload/tar.vim when decompressing .tgz archives on Unix-like systems.
    The function builds :!gunzip and :!gzip -d commands using shellescape(tartail) without the {special} flag,
    allowing a crafted archive filename to trigger Vim cmdline-special expansion and execute shell commands in
    the user's context. This vulnerability is fixed in 9.2.0479. (CVE-2026-46483)

    Vim is an open source, command line text editor. Prior to version 9.2.0495, a Vimscript code injection
    vulnerability exists in s:NetrwBookHistSave() in the netrw plugin
    (runtime/pack/dist/opt/netrw/autoload/netrw.vim) when serializing browsed directory paths to the history
    file ~/.vim/.netrwhist. A directory name derived from the filesystem is interpolated into a single-quoted
    Vimscript string literal without escaping embedded single quotes, allowing a crafted directory name to
    break out of the string context and execute arbitrary Vimscript, including shell commands via system() and
    :!, the next time the history file is sourced. This issue has been patched in version 9.2.0495.
    (CVE-2026-47162)

    Vim is an open source, command line text editor. Prior to version 9.2.0496, a code injection vulnerability
    exists in s:stepmatch() in the cucumber filetype plugin (runtime/ftplugin/cucumber.vim) on Vim builds with
    +ruby support. Step-definition patterns read from .rb files under the repository's features/*/ or
    stories/*/ directories are embedded into a Ruby Kernel.eval argument without sufficient escaping, allowing
    a crafted pattern in an attacker-controlled repository to execute arbitrary Ruby (and through it arbitrary
    shell commands) when the user invokes a step-jump mapping ([d, ]d). This issue has been patched in version
    9.2.0496. (CVE-2026-47167)

    Vim is an open source, command line text editor. Prior to version 9.2.0561, the Python omni-completion
    script in python3complete.vim for Vim with the +python3 interpreter enabled (and the legacy
    pythoncomplete.vim for builds with the +python interpreter) executes the import and from statements found
    in the current buffer through Python's import machinery. Because the buffer's working directory is on
    sys.path, opening a hostile .py file with a sibling Python package and invoking omni-completion runs that
    package's top-level code as the editing user. This issue has been patched in version 9.2.0561.
    (CVE-2026-52858)

    Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function
    in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken.
    For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it
    encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots -- a
    base character plus five combining marks -- the bundled libvterm returns the array without a terminating
    NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer
    reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger
    this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in
    version 9.2.0565. (CVE-2026-52859)

    Vim is an open source, command line text editor. Prior to version 9.2.0597, Vim's Python omni-completion
    executes reconstructed function and class definitions from the current buffer with exec() as part of
    populating the completion dictionary. Python evaluates function default values, parameter annotations, and
    class base expressions at definition time, so a hostile buffer can execute attacker-controlled Python
    expressions during omni-completion. The existing g:pythoncomplete_allow_import mitigation (GHSA-52mc-
    rq6p-rc7c) does not cover this path, because the attacker-controlled code is not a harvested import/from
    statement. This issue has been patched in version 9.2.0597. (CVE-2026-52860)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1862.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-35177.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-39881.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-42307.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-43961.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-44656.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-45130.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-46483.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-47162.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-47167.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-52858.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-52859.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-52860.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update vim --releasever 2023.12.20260622' or
  or 'dnf update --advisory ALAS2023-2026-1862 --releasever 2023.12.20260622' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-47162");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-52860");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/04/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-default-editor");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-enhanced");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-enhanced-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:vim-minimal-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xxd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xxd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm2.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'vim-common-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-common-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-data-9.2.597-1.amzn2023.0.1', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-debugsource-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-debugsource-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-default-editor-9.2.597-1.amzn2023.0.1', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-enhanced-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-enhanced-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-enhanced-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-enhanced-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-filesystem-9.2.597-1.amzn2023.0.1', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-minimal-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-minimal-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-minimal-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'vim-minimal-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xxd-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xxd-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xxd-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xxd-debuginfo-9.2.597-1.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "vim-common / vim-data / vim-debuginfo / etc");
}