Dovecot ACL Plugin Security Bypass Vulnerabilities

# SPDX-FileCopyrightText: 2008 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:dovecot:dovecot";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.800030");
  script_version("2024-01-23T05:05:19+0000");
  script_tag(name:"last_modification", value:"2024-01-23 05:05:19 +0000 (Tue, 23 Jan 2024)");
  script_tag(name:"creation_date", value:"2008-10-17 14:35:03 +0200 (Fri, 17 Oct 2008)");
  script_tag(name:"cvss_base", value:"6.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-01-21 02:46:00 +0000 (Sun, 21 Jan 2024)");
  script_cve_id("CVE-2008-4577", "CVE-2008-4578");
  script_name("Dovecot ACL Plugin Security Bypass Vulnerabilities");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Privilege escalation");
  script_dependencies("gb_dovecot_consolidation.nasl");
  script_mandatory_keys("dovecot/detected");

  script_xref(name:"URL", value:"http://www.frsirt.com/english/advisories/2008/2745");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/31587");
  script_xref(name:"URL", value:"http://www.dovecot.org/list/dovecot-news/2008-October/000085.html");

  script_tag(name:"impact", value:"Successful attack could allow malicious people to bypass certain
  security restrictions or manipulate certain data.");

  script_tag(name:"affected", value:"Dovecot versions prior to 1.1.4.");

  script_tag(name:"insight", value:"The flaws are due to:

  - the ACL plugin interprets negative access rights as positive access rights,
  potentially giving an unprivileged user access to restricted resources.

  - an error in the ACL plugin when imposing mailbox creation restrictions to create
  parent/child/child mailboxes.");

  script_tag(name:"solution", value:"Upgrade to Dovecot version 1.1.4 or later.");

  script_tag(name:"summary", value:"Dovecot ACL Plugin is prone to multiple security bypass vulnerabilities.");

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

  exit(0);
}

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

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_less(version: version, test_version: "1.1.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.1.4", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);