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openvasCopyright (C) 2018 Greenbone AGOPENVAS:1361412562310812520
HistoryFeb 20, 2018 - 12:00 a.m.

PHP 'PHP-FPM' Denial of Service Vulnerability - Linux

2018-02-2000:00:00
Copyright (C) 2018 Greenbone AG
plugins.openvas.org
83

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

7.6

Confidence

High

EPSS

0.006

Percentile

78.2%

PHP is prone to a denial of service (DoS) vulnerability.

# SPDX-FileCopyrightText: 2018 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:php:php";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.812520");
  script_version("2024-02-15T05:05:40+0000");
  script_cve_id("CVE-2015-9253");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:C");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2020-02-19 00:15:00 +0000 (Wed, 19 Feb 2020)");
  script_tag(name:"creation_date", value:"2018-02-20 18:02:59 +0530 (Tue, 20 Feb 2018)");
  script_name("PHP 'PHP-FPM' Denial of Service Vulnerability - Linux");
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_dependencies("gb_php_ssh_login_detect.nasl", "gb_php_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("php/detected", "Host/runs_unixoide");

  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=73342");
  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=70185");
  script_xref(name:"URL", value:"https://github.com/php/php-src/pull/3287");
  script_xref(name:"URL", value:"https://www.futureweb.at/security/CVE-2015-9253");

  script_tag(name:"summary", value:"PHP is prone to a denial of service (DoS) vulnerability.");

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

  script_tag(name:"insight", value:"The flaw exists due to the php-fpm master
  process restarts a child process in an endless loop when using program
  execution functions with a non-blocking STDIN stream.");

  script_tag(name:"impact", value:"Successfully exploitation will allow an
  attacker to consume 100% of the CPU, and consume disk space with a large
  volume of error logs, as demonstrated by an attack by a customer of a
  shared-hosting facility.");

  script_tag(name:"affected", value:"PHP versions 5.x up to and including 5.6.36. All 7.0.x versions,
  7.1.x before 7.1.20, 7.2.x before 7.2.8 and 7.3.x before 7.3.0alpha3 on Windows.");

  script_tag(name:"solution", value:"Update to PHP 7.1.20, 7.2.8 or 7.3.0alpha3.");

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

  exit(0);
}

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

if(isnull(phpPort = get_app_port(cpe:CPE))) exit(0);
if(!infos = get_app_version_and_location(cpe:CPE, port:phpPort, exit_no_version:TRUE)) exit(0);
phpVers = infos['version'];
path = infos['location'];

# nb: Fix is only shipped / released in the branches 7.1.x and up and fixed starting with 7.1.20.
if(version_in_range(version:phpVers, test_version:"5.0", test_version2:"7.1.19")){
  fix = "7.1.20";
} else if(phpVers =~ "^7\.2\." && version_is_less(version:phpVers, test_version:"7.2.8")){
  fix = "7.2.8";
} else if(phpVers =~ "^7\.3\." && version_is_less(version:phpVers, test_version:"7.3.0alpha3")){
  fix = "7.3.0alpha3";
}

if(fix){
  report = report_fixed_ver(installed_version:phpVers, fixed_version:fix, install_path:path);
  security_message(port:phpPort, data:report);
  exit(0);
}

exit(99);

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

7.6

Confidence

High

EPSS

0.006

Percentile

78.2%