Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Wget vulnerabilities (USN-8543-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8543-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(327000);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/15");

  script_cve_id(
    "CVE-2024-38428",
    "CVE-2026-58469",
    "CVE-2026-58470",
    "CVE-2026-58471",
    "CVE-2026-58472"
  );
  script_xref(name:"USN", value:"8543-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Wget vulnerabilities (USN-8543-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has a package
installed that is affected by multiple vulnerabilities as referenced in the USN-8543-1 advisory.

    It was discovered that Wget mishandled semicolons in the userinfo subcomponent of a URL. A remote attacker
    could possibly use this issue to trick a user into connecting to a different host than intended. This
    issue only affected Ubuntu 14.04 LTS. (CVE-2024-38428)

    It was discovered that Wget incorrectly handled Metalink documents containing a whitespace-only URL. A
    remote attacker could possibly use this issue to cause a denial of service. This issue only affected
    Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2026-58469)

    It was discovered that Wget incorrectly handled Content-Range header values, leading to an integer
    overflow. A remote attacker could possibly use this issue to cause download desynchronization.
    (CVE-2026-58470)

    It was discovered that Wget incorrectly handled character set conversion of server-supplied filenames. A
    remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary
    code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and
    Ubuntu 26.04 LTS. (CVE-2026-58471)

    It was discovered that Wget incorrectly handled HTML attributes requiring entity encoding. A remote
    attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code.
    (CVE-2026-58472)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-8543-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected wget package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-38428");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-58469");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/06/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:wget");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 26.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '14.04', 'pkgname': 'wget', 'pkgver': '1.15-1ubuntu1.14.04.5+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-38428', 'CVE-2026-58470', 'CVE-2026-58472']},
    {'osver': '16.04', 'pkgname': 'wget', 'pkgver': '1.17.1-1ubuntu1.5+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2026-58470', 'CVE-2026-58472']},
    {'osver': '18.04', 'pkgname': 'wget', 'pkgver': '1.19.4-1ubuntu2.2+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2026-58469', 'CVE-2026-58470', 'CVE-2026-58471', 'CVE-2026-58472']},
    {'osver': '20.04', 'pkgname': 'wget', 'pkgver': '1.20.3-1ubuntu2.1+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2026-58469', 'CVE-2026-58470', 'CVE-2026-58471', 'CVE-2026-58472']},
    {'osver': '22.04', 'pkgname': 'wget', 'pkgver': '1.21.2-2ubuntu1.3', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-58469', 'CVE-2026-58470', 'CVE-2026-58471', 'CVE-2026-58472']},
    {'osver': '24.04', 'pkgname': 'wget', 'pkgver': '1.21.4-1ubuntu4.3', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-58469', 'CVE-2026-58470', 'CVE-2026-58471', 'CVE-2026-58472']},
    {'osver': '26.04', 'pkgname': 'wget', 'pkgver': '1.25.0-2ubuntu4.2', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-58469', 'CVE-2026-58470', 'CVE-2026-58471', 'CVE-2026-58472']}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'wget');
}