EulerOS 2.0 SP10 : vim (EulerOS-SA-2026-3773)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(347994);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/18");

  script_cve_id(
    "CVE-2026-47162",
    "CVE-2026-52860",
    "CVE-2026-55693",
    "CVE-2026-55895",
    "CVE-2026-57455",
    "CVE-2026-57456",
    "CVE-2026-59856",
    "CVE-2026-59858"
  );

  script_name(english:"EulerOS 2.0 SP10 : vim (EulerOS-SA-2026-3773)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the vim packages installed, the EulerOS installation on the remote host is affected by the
following vulnerabilities :

    Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion script in
    runtime/autoload/ccomplete.vim interpolates the typeref: or typename: extension field of a tags entry,
    without escaping, into a :vimgrep pattern that is run through :execute. Because :vimgrep honors the bar as
    a command separator, a crafted tag field can close the search pattern and append an arbitrary Ex command;
    opening a hostile .c file whose project tags file contains such an entry and invoking C omni-completion
    runs that command as the editing user. This issue is fixed in version 9.2.0735.(CVE-2026-59858)

    Vim is an open source, command line text editor. Prior to 9.2.0736, the PHP omni-completion script in
    runtime/autoload/phpcomplete.vim interpolates a class or trait name, taken from the contents of the edited
    buffer, into a search() pattern that is run via win_execute() without escaping. A name containing a single
    quote can terminate the search() string argument early, and because the bar is honored as an Ex command
    separator, the remainder of the name is run as Ex commands; via the :! command this allows arbitrary
    operating-system command execution when a victim opens a crafted PHP file and invokes omni-completion.
    This issue is fixed in version 9.2.0736.(CVE-2026-59856)

    Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in
    src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a
    depth counter. The counter is bounded only by the trie structure itself; it is never checked against the
    size of the fixed MAXWLEN-element stack arrays it indexes (arridx[], curi[], wordcount[]). A crafted
    .spl/.sug file pair, loaded when the user invokes spell suggestion, can drive the descent arbitrarily
    deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that
    corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0653.(CVE-2026-55693)

    Vim is an open source, command line text editor. Prior to 9.2.0699, Vim's Python omni-completion
    (runtime/autoload/python3complete.vim and the legacy pythoncomplete.vim) executes reconstructed function
    and class definitions from the current buffer with exec() as part of populating the completion dictionary.
    When reconstructing that source, each scope's docstring is inserted verbatim between triple quotes with no
    escaping, so a hostile buffer can break out of the triple-quoted literal and execute attacker-controlled
    Python during omni-completion. This vulnerability is fixed in 9.2.0699.(CVE-2026-57456)

    Vim is an open source, command line text editor. Prior to 9.2.0698, the single-byte branch of
    spell_soundfold_sofo() in src/spell.c translates a word through a spell file's SOFO (sound-folding) byte
    map into a caller-owned result buffer. Its copy loop advances the output index ri with no upper bound and
    terminates only on the input NUL, writing one byte per input byte into the MAXWLEN-element stack buffer
    the caller provides. A word longer than MAXWLEN, passed to soundfold() (or reached via sound-based spell
    suggestion) while a SOFO-based spell language is active, therefore writes past the end of that buffer.
    This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This
    vulnerability is fixed in 9.2.0698.(CVE-2026-57455)

    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)

    Vim is an open source, command line text editor. Prior to 9.2.0663, a Vimscript code injection
    vulnerability exists in s:NetrwLocalRmFile() in the netrw plugin
    (runtime/pack/dist/opt/netrw/autoload/netrw.vim) when deleting a local file from the browser. A filename
    derived from the buffer's directory listing is interpolated into an Ex command line passed to :execute
    with only the backslash character escaped, allowing a crafted filename containing a bar (|) to terminate
    the intended command and execute arbitrary Vimscript, including shell commands via :call system() and :!.
    This vulnerability is fixed in 9.2.0663.(CVE-2026-55895)

    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)

Tenable has extracted the preceding description block directly from the EulerOS vim security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2026-3773
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b6841589");
  script_set_attribute(attribute:"solution", value:
"Update the affected vim packages.");
  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:L/AC:L/AT:N/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-2026-59858");

  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:"2026/06/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:vim-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:vim-enhanced");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:vim-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:vim-minimal");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei 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/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("rpm.inc");

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

var _release = get_kb_item("Host/EulerOS/release");
if (isnull(_release) || _release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (_release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(10)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10", "EulerOS UVP " + uvp);

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

var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "vim-common-9.0-1.h22.r15.eulerosv2r10",
  "vim-enhanced-9.0-1.h22.r15.eulerosv2r10",
  "vim-filesystem-9.0-1.h22.r15.eulerosv2r10",
  "vim-minimal-9.0-1.h22.r15.eulerosv2r10"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"10", reference:pkg)) 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");
}