Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Redis, Lua vulnerabilities (USN-8169-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8169-1. 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(306359);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/14");

  script_cve_id("CVE-2022-24834", "CVE-2024-31449", "CVE-2025-49844");
  script_xref(name:"IAVA", value:"2025-A-0731-S");
  script_xref(name:"USN", value:"8169-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Redis, Lua vulnerabilities (USN-8169-1)");

  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 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are
affected by multiple vulnerabilities as referenced in the USN-8169-1 advisory.

    It was discovered that Redis incorrectly handled certain specially crafted Lua scripts. A remote attacker
    could possibly use this issue to cause a denial of service or execute arbitrary code. This issue was only
    addressed in lua5.1 on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2025-49844)

    It was discovered that Redis incorrectly handled certain specially crafted Lua scripts. A remote attacker
    could possibly use this issue to cause a denial of service or execute arbitrary code. This issue was only
    addressed in lua-bitop on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS and in redis on Ubuntu 16.04 LTS, Ubuntu
    18.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-31449)

    Seiya Nakata and Yudai Fujiwara discovered that Redis incorrectly handled certain specially crafted Lua
    scripts. An attacker could possibly use this issue to cause heap corruption and execute arbitrary code.
    This issue was only addressed in lua-cjson on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-24834)

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-8169-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-49844");

  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:"2023/07/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"p-cpe:/a:canonical:ubuntu_linux:liblua5.1-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblua5.1-0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblua5.1-bitop-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblua5.1-bitop0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lua-bitop");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lua-bitop-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lua-cjson");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lua-cjson-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lua5.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-sentinel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-tools");
  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:"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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 24.04', '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': '16.04', 'pkgname': 'redis-sentinel', 'pkgver': '2:3.0.6-1ubuntu0.4+esm5', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'redis-server', 'pkgver': '2:3.0.6-1ubuntu0.4+esm5', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'redis-tools', 'pkgver': '2:3.0.6-1ubuntu0.4+esm5', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'redis', 'pkgver': '5:4.0.9-1ubuntu0.2+esm7', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'redis-sentinel', 'pkgver': '5:4.0.9-1ubuntu0.2+esm7', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'redis-server', 'pkgver': '5:4.0.9-1ubuntu0.2+esm7', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'redis-tools', 'pkgver': '5:4.0.9-1ubuntu0.2+esm7', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'liblua5.1-0', 'pkgver': '5.1.5-8.1ubuntu0.20.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'liblua5.1-0-dev', 'pkgver': '5.1.5-8.1ubuntu0.20.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'liblua5.1-bitop-dev', 'pkgver': '1.0.2-5ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'liblua5.1-bitop0', 'pkgver': '1.0.2-5ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'lua-bitop', 'pkgver': '1.0.2-5ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'lua-bitop-dev', 'pkgver': '1.0.2-5ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'lua-cjson', 'pkgver': '2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'lua-cjson-dev', 'pkgver': '2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'lua5.1', 'pkgver': '5.1.5-8.1ubuntu0.20.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'liblua5.1-0', 'pkgver': '5.1.5-8.1ubuntu0.22.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'liblua5.1-0-dev', 'pkgver': '5.1.5-8.1ubuntu0.22.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'liblua5.1-bitop-dev', 'pkgver': '1.0.2-5ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'liblua5.1-bitop0', 'pkgver': '1.0.2-5ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'lua-bitop', 'pkgver': '1.0.2-5ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'lua-bitop-dev', 'pkgver': '1.0.2-5ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'lua-cjson', 'pkgver': '2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'lua-cjson-dev', 'pkgver': '2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'lua5.1', 'pkgver': '5.1.5-8.1ubuntu0.22.04.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'redis', 'pkgver': '5:7.0.15-1ubuntu0.24.04.4', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'redis-sentinel', 'pkgver': '5:7.0.15-1ubuntu0.24.04.4', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'redis-server', 'pkgver': '5:7.0.15-1ubuntu0.24.04.4', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'redis-tools', 'pkgver': '5:7.0.15-1ubuntu0.24.04.4', '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_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, 'liblua5.1-0 / liblua5.1-0-dev / liblua5.1-bitop-dev / etc');
}