Cyrus IMAP 2.5.x < 2.5.15, 3.0.x < 3.0.13 ACL Bypass Vulnerability

# SPDX-FileCopyrightText: 2019 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:cyrus:imap";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.143263");
  script_version("2025-09-05T15:40:40+0000");
  script_tag(name:"last_modification", value:"2025-09-05 15:40:40 +0000 (Fri, 05 Sep 2025)");
  script_tag(name:"creation_date", value:"2019-12-18 03:51:27 +0000 (Wed, 18 Dec 2019)");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-10-14 05:15:00 +0000 (Wed, 14 Oct 2020)");

  script_cve_id("CVE-2019-19783");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Cyrus IMAP 2.5.x < 2.5.15, 3.0.x < 3.0.13 ACL Bypass Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("General");
  script_dependencies("secpod_cyrus_imap_server_detect.nasl");
  script_mandatory_keys("cyrus/imap_server/detected");

  script_tag(name:"summary", value:"Cyrus IMAP is prone to an ACL bypass vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"If sieve script uploading is allowed (3.x) or certain non-default sieve
  options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a
  fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in
  autosieve_createfolder() in imap/lmtp_sieve.c.");

  script_tag(name:"affected", value:"Cyrus IMAP versions 2.5.0 - 2.5.14 and 3.0.0 - 3.0.12.");

  script_tag(name:"solution", value:"Update to version 2.5.15, 3.0.13 or later.");

  script_xref(name:"URL", value:"https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html");
  script_xref(name:"URL", value:"https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

if (version_in_range(version: version, test_version: "2.5", test_version2: "2.5.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.5.15");
  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "3.0", test_version2: "3.0.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.0.13");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);