Squid 2.5.STABLE2 < 4.15, 5.0.1 < 5.0.6 Multiple DoS Vulnerabilities (GHSA-pxwq-f3qr-w2xf, SQUID-2021:4)

# SPDX-FileCopyrightText: 2021 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:squid-cache:squid";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.146027");
  script_version("2024-03-07T05:06:18+0000");
  script_tag(name:"last_modification", value:"2024-03-07 05:06:18 +0000 (Thu, 07 Mar 2024)");
  script_tag(name:"creation_date", value:"2021-05-28 03:31:55 +0000 (Fri, 28 May 2021)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-16 11:15:00 +0000 (Fri, 16 Jul 2021)");

  script_cve_id("CVE-2021-31806", "CVE-2021-31807", "CVE-2021-31808");

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

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

  script_name("Squid 2.5.STABLE2 < 4.15, 5.0.1 < 5.0.6 Multiple DoS Vulnerabilities (GHSA-pxwq-f3qr-w2xf, SQUID-2021:4)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_squid_http_detect.nasl");
  script_mandatory_keys("squid/detected");

  script_tag(name:"summary", value:"Squid is prone to multiple denial of service (DoS) vulnerabilities.");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - CVE-2021-31806: Due to an incorrect input validation bug Squid is vulnerable to a DoS attack
    against all clients using the proxy.

  - CVE-2021-31807: Due to an incorrect memory management bug Squid is vulnerable to a DoS attack
    against all clients using the proxy.

  - CVE-2021-31808: Due to an integer overflow bug Squid is vulnerable to a DoS attack against all
    clients using the proxy.

  These flaws were part of the 'Squid Caching Proxy Security Audit: 55 vulnerabilities and 35 0days'
  publication in October 2023 and filed as 'Partial Content Parsing Use-After-Free', 'Integer
  Overflow in Range Header' and 'Unsatisfiable Range Requests Assertion'.");

  script_tag(name:"affected", value:"Squid version 2.5.STABLE2 through 2.7.STABLE9, 3.0 through 4.14
  and 5.0.1 through 5.0.5.");

  script_tag(name:"solution", value:"Update to version 4.15, 5.0.6 or later.");

  script_xref(name:"URL", value:"https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf");
  script_xref(name:"URL", value:"https://megamansec.github.io/Squid-Security-Audit/");
  script_xref(name:"URL", value:"https://joshua.hu/squid-security-audit-35-0days-45-exploits");
  script_xref(name:"URL", value:"https://www.openwall.com/lists/oss-security/2023/10/11/3");
  script_xref(name:"URL", value:"https://megamansec.github.io/Squid-Security-Audit/range-uaf.html");
  script_xref(name:"URL", value:"https://megamansec.github.io/Squid-Security-Audit/range-assert-int.html");
  script_xref(name:"URL", value:"https://megamansec.github.io/Squid-Security-Audit/range-assert.html");

  exit(0);
}

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

if (!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 =~ "^2\.[567]" || version_in_range(version: version, test_version: "3.0", test_version2: "4.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.15", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "5.0.1", test_version2: "5.0.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.6", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);