Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : RestrictedPython vulnerabilities (USN-7355-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7355-1. 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(232986);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/03");

  script_cve_id(
    "CVE-2023-37271",
    "CVE-2023-41039",
    "CVE-2024-47532",
    "CVE-2025-22153"
  );
  script_xref(name:"USN", value:"7355-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : RestrictedPython vulnerabilities (USN-7355-1)");

  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 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has a package installed that is affected by multiple
vulnerabilities as referenced in the USN-7355-1 advisory.

    Nakul Choudhary and Robert Xiao discovered that RestrictedPython did not properly sanitize certain inputs.
    An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 20.04
    LTS and Ubuntu 22.04 LTS. (CVE-2023-37271)

    Abhishek Govindarasu, Ankush Menat and Ward Theunisse discovered that RestrictedPython did not correctly
    handle certain format strings. An attacker could possibly use this issue to leak sensitive information.
    This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-41039)

    It was discovered that RestrictedPython did not correctly restrict access to certain fields. An attacker
    could possibly use this issue to leak sensitive information. (CVE-2024-47532)

    It was discovered that RestrictedPython contained a type confusion vulnerability. An attacker could
    possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu
    24.10. (CVE-2025-22153)

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-7355-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected python3-restrictedpython package.");
  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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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-2023-37271");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2024-47532");

  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:"2025/03/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:24.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-restrictedpython");
  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) 2025 Canonical, Inc. / NASL script (C) 2025 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 (! ('20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '24.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04 / 24.10', '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': '20.04', 'pkgname': 'python3-restrictedpython', 'pkgver': '4.0~b3-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-37271', 'CVE-2023-41039', 'CVE-2024-47532']},
    {'osver': '22.04', 'pkgname': 'python3-restrictedpython', 'pkgver': '4.0~b3-3ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-37271', 'CVE-2023-41039', 'CVE-2024-47532']},
    {'osver': '24.04', 'pkgname': 'python3-restrictedpython', 'pkgver': '6.2-1ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-47532', 'CVE-2025-22153']},
    {'osver': '24.10', 'pkgname': 'python3-restrictedpython', 'pkgver': '6.2-1ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2024-47532', 'CVE-2025-22153']}
];

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, 'python3-restrictedpython');
}