Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : jq vulnerabilities (USN-8202-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8202-1. 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(310123);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/24");

  script_cve_id(
    "CVE-2026-32316",
    "CVE-2026-33947",
    "CVE-2026-33948",
    "CVE-2026-39956",
    "CVE-2026-39979",
    "CVE-2026-40164"
  );
  script_xref(name:"IAVB", value:"2025-B-0188");
  script_xref(name:"USN", value:"8202-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : jq vulnerabilities (USN-8202-1)");

  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 / 25.10 host has packages
installed that are affected by multiple vulnerabilities as referenced in the USN-8202-1 advisory.

    It was discovered that jq did not correctly handle certain string concatenations. An attacker could
    possibly use this issue to cause a denial of service or execute arbitrary code. This issue was addressed
    in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu
    25.10. (CVE-2026-32316)

    It was discovered that jq did not correctly handle recursion in certain circumstances. An attacker could
    possibly use this issue to cause a denial of service. (CVE-2026-33947)

    It was discovered that jq did not correctly handle improperly terminated strings. An attacker could
    possibly use this issue to cause a denial of service or execute arbitrary code. This issue was addressed
    in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu
    25.10. (CVE-2026-33948)

    It was discovered that jq did not correctly handle checking certain variable types. An attacker could
    possibly use this issue to cause a denial of service or leak sensitive information. This issue was
    addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and
    Ubuntu 25.10. (CVE-2026-39956)

    It was discovered that jq did not correctly handle certain string formatting. An attacker could possibly
    use this issue to leak sensitive information or cause a denial of service. (CVE-2026-39979)

    It was discovered that jq used a fixed seed for hash table operations. An attacker could possibly use this
    issue to cause a denial of service. This issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu
    20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-40164)

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-8202-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected jq, libjq-dev and / or libjq1 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  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:N/S:U/C:L/I:N/A:L");
  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:N/PR:N/UI:N/VC:L/VI:N/VA:L/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-2026-39979");

  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:"2025/11/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/24");

  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:25.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:jq");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjq-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjq1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  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 || '25.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 25.10', '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': 'jq', 'pkgver': '1.3-1.1ubuntu1.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'jq', 'pkgver': '1.5+dfsg-1ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'jq', 'pkgver': '1.5+dfsg-2ubuntu0.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libjq-dev', 'pkgver': '1.5+dfsg-2ubuntu0.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libjq1', 'pkgver': '1.5+dfsg-2ubuntu0.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'jq', 'pkgver': '1.6-1ubuntu0.20.04.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libjq-dev', 'pkgver': '1.6-1ubuntu0.20.04.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libjq1', 'pkgver': '1.6-1ubuntu0.20.04.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'jq', 'pkgver': '1.6-2.1ubuntu3.2', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libjq-dev', 'pkgver': '1.6-2.1ubuntu3.2', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libjq1', 'pkgver': '1.6-2.1ubuntu3.2', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'jq', 'pkgver': '1.7.1-3ubuntu0.24.04.2', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'libjq-dev', 'pkgver': '1.7.1-3ubuntu0.24.04.2', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'libjq1', 'pkgver': '1.7.1-3ubuntu0.24.04.2', 'ubuntu_pro': FALSE},
    {'osver': '25.10', 'pkgname': 'jq', 'pkgver': '1.8.1-3ubuntu1.1', 'ubuntu_pro': FALSE},
    {'osver': '25.10', 'pkgname': 'libjq-dev', 'pkgver': '1.8.1-3ubuntu1.1', 'ubuntu_pro': FALSE},
    {'osver': '25.10', 'pkgname': 'libjq1', 'pkgver': '1.8.1-3ubuntu1.1', 'ubuntu_pro': FALSE}
];

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_WARNING,
    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, 'jq / libjq-dev / libjq1');
}