Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Cyrus IMAP Server vulnerabilities (USN-7224-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7224-1. 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(214517);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/03");

  script_cve_id("CVE-2019-18928", "CVE-2021-33582", "CVE-2024-34055");
  script_xref(name:"USN", value:"7224-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Cyrus IMAP Server vulnerabilities (USN-7224-1)");

  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 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-7224-1 advisory.

    It was discovered that non-authentication-related HTTP requests could be interpreted in an authentication
    context by a Cyrus IMAP Server when multiple requests arrived over the same connection. An unauthenticated
    attacker could possibly use this issue to perform a privilege escalation attack. This issue only affected
    Ubuntu 18.04 LTS. (CVE-2019-18928)

    Matthew Horsfall discovered that Cyrus IMAP Server utilized a poor string hashing algorithm that could be
    abused to control where data was being stored. An attacker could possibly use this issue to perform a
    denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-33582)

    Damian Poddebniak discovered that Cyrus IMAP Server could interpret specially crafted commands to exploit
    a memory issue. An authenticated attacker could possibly use this issue to perform a denial of service.
    This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-34055)

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-7224-1");
  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:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-18928");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/01/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/01/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:cyrus-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-caldav");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-imapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-murder");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-nntpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-pop3d");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cyrus-replication");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcyrus-imap-perl");
  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 (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 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': '18.04', 'pkgname': 'cyrus-admin', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-caldav', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-clients', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-common', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-dev', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-imapd', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-murder', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-nntpd', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-pop3d', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'cyrus-replication', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '18.04', 'pkgname': 'libcyrus-imap-perl', 'pkgver': '2.5.10-3ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2019-18928', 'CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-admin', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-caldav', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-clients', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-common', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-dev', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-imapd', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-murder', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-nntpd', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-pop3d', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'cyrus-replication', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '20.04', 'pkgname': 'libcyrus-imap-perl', 'pkgver': '3.0.13-5ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-33582']},
    {'osver': '22.04', 'pkgname': 'cyrus-admin', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-caldav', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-clients', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-common', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-dev', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-imapd', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-murder', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-nntpd', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-pop3d', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'cyrus-replication', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '22.04', 'pkgname': 'libcyrus-imap-perl', 'pkgver': '3.4.3-3ubuntu0.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-admin', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-caldav', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-clients', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-common', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-dev', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-imapd', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-murder', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-nntpd', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-pop3d', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'cyrus-replication', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']},
    {'osver': '24.04', 'pkgname': 'libcyrus-imap-perl', 'pkgver': '3.8.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-34055']}
];

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, 'cyrus-admin / cyrus-caldav / cyrus-clients / cyrus-common / etc');
}