Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Tomcat vulnerabilities (USN-6943-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6943-1. 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(204963);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2020-9484",
    "CVE-2021-25122",
    "CVE-2021-41079",
    "CVE-2022-23181",
    "CVE-2022-29885"
  );
  script_xref(name:"IAVA", value:"2020-A-0225-S");
  script_xref(name:"IAVA", value:"2021-A-0114-S");
  script_xref(name:"IAVA", value:"2021-A-0303-S");
  script_xref(name:"IAVA", value:"2021-A-0483");
  script_xref(name:"IAVA", value:"2022-A-0222-S");
  script_xref(name:"USN", value:"6943-1");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Tomcat vulnerabilities (USN-6943-1)");

  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 host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-6943-1 advisory.

    It was discovered that Tomcat incorrectly handled certain uncommon PersistenceManager with FileStore
    configurations. A remote attacker could possibly use this issue to execute arbitrary code. This issue only
    affected tomcat8 for Ubuntu 18.04 LTS (CVE-2020-9484)

    It was discovered that Tomcat incorrectly handled certain HTTP/2 connection requests. A remote attacker
    could use this issue to obtain wrong responses possibly containing sensitive information. This issue only
    affected tomcat8 for Ubuntu 18.04 LTS (CVE-2021-25122)

    Thomas Wozenilek discovered that Tomcat incorrectly handled certain TLS packets. A remote attacker could
    possibly use this issue to cause a denial of service. This issue only affected tomcat8 for Ubuntu 18.04
    LTS (CVE-2021-41079)

    Trung Pham discovered that a race condition existed in Tomcat when handling session files with FileStore.
    A remote attacker could possibly use this issue to execute arbitrary code. This issue affected tomcat8 for
    Ubuntu 16.04 LTS and Ubuntu 18.04 LTS, and tomcat9 for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS
    (CVE-2022-23181)

    It was discovered that Tomcat's documentation incorrectly stated that EncryptInterceptor provided
    availability protection when running over an untrusted network. A remote attacker could possibly use this
    issue to cause a denial of service even if EncryptInterceptor was being used. This issue affected tomcat8
    for Ubuntu 18.04 LTS, and tomcat9 for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS
    (CVE-2022-29885)

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-6943-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:H/I:N/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-2021-25122");

  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:"2020/05/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/08/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/08/01");

  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:"p-cpe:/a:canonical:ubuntu_linux:libservlet3.1-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtomcat8-embed-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtomcat8-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtomcat9-embed-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtomcat9-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9-user");
  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) 2024 Canonical, Inc. / NASL script (C) 2024 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)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04', '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': 'libservlet3.1-java', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libtomcat8-java', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'tomcat8', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'tomcat8-admin', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'tomcat8-common', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'tomcat8-examples', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'tomcat8-user', 'pkgver': '8.0.32-1ubuntu1.13+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libtomcat8-embed-java', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libtomcat8-java', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libtomcat9-embed-java', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libtomcat9-java', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat8', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat8-admin', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat8-common', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat8-examples', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat8-user', 'pkgver': '8.5.39-1ubuntu1~18.04.3+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat9', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat9-admin', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat9-common', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat9-examples', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'tomcat9-user', 'pkgver': '9.0.16-3ubuntu0.18.04.2+esm2', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libtomcat9-embed-java', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'libtomcat9-java', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'tomcat9', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'tomcat9-admin', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'tomcat9-common', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'tomcat9-examples', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '20.04', 'pkgname': 'tomcat9-user', 'pkgver': '9.0.31-1ubuntu0.6', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libtomcat9-embed-java', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libtomcat9-java', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'tomcat9', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'tomcat9-admin', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'tomcat9-common', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'tomcat9-examples', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'tomcat9-user', 'pkgver': '9.0.58-1ubuntu0.1+esm2', 'ubuntu_pro': TRUE}
];

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'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) {
        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, 'libservlet3.1-java / libtomcat8-embed-java / libtomcat8-java / etc');
}