Ubuntu 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : JOSE for C/C++ vulnerability (USN-6307-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6307-1. 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(180187);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/26");

  script_cve_id("CVE-2023-37464");
  script_xref(name:"USN", value:"6307-1");

  script_name(english:"Ubuntu 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : JOSE for C/C++ vulnerability (USN-6307-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by a
vulnerability as referenced in the USN-6307-1 advisory.

  - OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). The AES GCM
    decryption routine incorrectly uses the Tag length from the actual Authentication Tag provided in the JWE.
    The spec says that a fixed length of 16 octets must be applied. Therefore this bug allows an attacker to
    provide a truncated Authentication Tag and to modify the JWE accordingly. Users should upgrade to a
    version >= 0.6.2.2. Users unable to upgrade should avoid using AES GCM encryption and replace it with
    another encryption algorithm (e.g. AES CBC). (CVE-2023-37464)

Note that Nessus has not tested for this issue 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-6307-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libcjose-dev and / or libcjose0 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
  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:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-37464");

  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:"2023/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  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:23.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcjose-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcjose0");
  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) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.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 (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04 / 23.04', '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 pkgs = [
    {'osver': '18.04', 'pkgname': 'libcjose-dev', 'pkgver': '0.6.0+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'libcjose0', 'pkgver': '0.6.0+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libcjose-dev', 'pkgver': '0.6.1+dfsg1-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libcjose0', 'pkgver': '0.6.1+dfsg1-1ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'libcjose-dev', 'pkgver': '0.6.1+dfsg1-3ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'libcjose0', 'pkgver': '0.6.1+dfsg1-3ubuntu1.1'},
    {'osver': '23.04', 'pkgname': 'libcjose-dev', 'pkgver': '0.6.2.1-1ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'libcjose0', 'pkgver': '0.6.2.1-1ubuntu0.1'}
];

var flag = 0;
foreach 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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libcjose-dev / libcjose0');
}