Vulnerabilities > CVE-2016-4436 - Security Bypass vulnerability in Apache Struts

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91812);
  script_version("1.15");
  script_cvs_date("Date: 2019/11/14");

  script_cve_id(
    "CVE-2016-0785",
    "CVE-2016-4430",
    "CVE-2016-4431",
    "CVE-2016-4433",
    "CVE-2016-4436",
    "CVE-2016-4438",
    "CVE-2016-4461"
  );
  script_bugtraq_id(
    85066,
    91275,
    91277,
    91280,
    91281,
    91282,
    91284
  );

  script_name(english:"Apache Struts 2.x < 2.3.29 Multiple Vulnerabilities (S2-035 - S2-040)");
  script_summary(english:"Checks the Struts 2 version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host contains a web application that uses a Java
framework that is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Apache Struts running on the remote Windows host is 2.x
prior to 2.3.29. It is, therefore, affected by the following
vulnerabilities :

  - A remote code execution vulnerability exists due to
    erroneously performing double OGNL evaluation of
    attribute values assigned to certain tags. An
    unauthenticated, remote attacker can exploit this, via a
    specially crafted request, to execute arbitrary code.
    (CVE-2016-0785)

  - A cross-site request forgery (XSRF) vulnerability exists
    due to improper validation of session tokens. An
    unauthenticated, remote attacker can exploit this, via a
    malicious OGNL expression, to bypass token validation
    and perform an XSRF attack. (CVE-2016-4430)

  - Multiple input validation issues exists that allow
    internal security mechanisms to be bypassed, allowing
    the manipulation of a return string which can be used to
    redirect users to a malicious website. This affects both
    the default action method the 'getter' action method.
    (CVE-2016-4431, CVE-2016-4433)

  - An unspecified flaw exists that is triggered during the
    cleanup of action names. An unauthenticated, remote
    attacker can exploit this, via a specially crafted
    payload, to perform unspecified actions. (CVE-2016-4436)

  - A remote code execution vulnerability exists in the REST
    plugin due to improper handling of OGNL expressions. An
    unauthenticated, remote attacker can exploit this, via
    a specially crafted OGNL expression, to execute
    arbitrary code. (CVE-2016-4438)

  - A remote code execution vulnerability exists in user tag
    attributes due to improper handling of OGNL expressions. 
    An unauthenticated, remote attacker can exploit this, 
    via a specially crafted double OGNL evaluation, to 
    execute arbitrary code. (CVE-2016-4461)

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://struts.apache.org/docs/s2-035.html");
  script_set_attribute(attribute:"see_also", value:"https://struts.apache.org/docs/s2-036.html");
  script_set_attribute(attribute:"see_also", value:"https://struts.apache.org/docs/s2-037.html");
  script_set_attribute(attribute:"see_also", value:"https://struts.apache.org/docs/s2-038.html");
  script_set_attribute(attribute:"see_also", value:"https://struts.apache.org/docs/s2-039.html");
  script_set_attribute(attribute:"see_also", value:"https://struts.apache.org/docs/s2-040.html");
  script_set_attribute(attribute:"see_also", value:"http://struts.apache.org/docs/version-notes-2329.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apache Struts version 2.3.29 or later. Alternatively,
apply the workarounds referenced in the vendor advisory.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4461");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"d2_elliot_name", value:"Apache Struts REST Plugin OGNL Expression Handling RCE");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/06/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/06/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/06/24");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:struts");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("os_fingerprint.nasl", "struts_detect_win.nbin", "struts_detect_nix.nbin", "struts_config_browser_detect.nbin");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("installed_sw/Apache Struts", "installed_sw/Struts");

  exit(0);
}

include('vcf.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);
app_info = vcf::combined_get_app_info(app:'Apache Struts');
vcf::check_granularity(app_info:app_info, sig_segments:3);

constraints = [
  { 'min_version' : '2.0.0', 'max_version' : '2.3.28.1', 'fixed_display' : '2.3.29' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE, flags:{xsrf:TRUE});

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99593);
  script_version("1.15");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-3092",
    "CVE-2016-4436",
    "CVE-2016-7055",
    "CVE-2017-3306",
    "CVE-2017-3307",
    "CVE-2017-3731",
    "CVE-2017-3732",
    "CVE-2017-5638"
  );
  script_bugtraq_id(
    91280,
    91453,
    94242,
    95813,
    95814,
    96729,
    97724,
    97844
  );
  script_xref(name:"CERT", value:"834067");
  script_xref(name:"EDB-ID", value:"41570");
  script_xref(name:"EDB-ID", value:"41614");

  script_name(english:"MySQL Enterprise Monitor 3.1.x < 3.1.7.8023 / 3.2.x < 3.2.7.1204 / 3.3.x < 3.3.3.1199 Multiple Vulnerabilities (April 2017 CPU)");
  script_summary(english:"Checks the version of MySQL Enterprise Monitor.");

  script_set_attribute(attribute:"synopsis", value:
"A web application running on the remote host is affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the MySQL Enterprise Monitor
application running on the remote host is 3.1.x prior to 3.1.7.8023,
3.2.x prior to 3.2.7.1204, or 3.3.x prior to 3.3.3.1199. It is,
therefore, affected by multiple vulnerabilities :

  - A denial of service vulnerability exists in the Apache
    Commons component in the FileUpload functionality due to
    improper handling of file upload requests. An
    unauthenticated, remote attacker can exploit this, via a
    specially crafted content-type header, to cause a denial
    of service condition. Note that this vulnerability does
    not affect MySQL Enterprise Monitor versions 3.3.x.
    (CVE-2016-3092)

  - An unspecified flaw exists in the Apache Struts
    component that is triggered during the cleanup of action
    names. An unauthenticated, remote attacker can exploit
    this, via a specially crafted payload, to perform
    unspecified actions. (CVE-2016-4436)

  - A carry propagation error exists in the OpenSSL
    component in the Broadwell-specific Montgomery
    multiplication procedure when handling input lengths
    divisible by but longer than 256 bits. This can result
    in transient authentication and key negotiation failures
    or reproducible erroneous outcomes of public-key
    operations with specially crafted input. A
    man-in-the-middle attacker can possibly exploit this
    issue to compromise ECDH key negotiations that utilize
    Brainpool P-512 curves. (CVE-2016-7055)

  - An unspecified flaw exists in the Monitoring Server
    subcomponent that allows an authenticated, remote
    attacker to impact confidentiality and integrity.
    (CVE-2017-3306)

  - An unspecified flaw exists in the Monitoring Server
    subcomponent that allows an authenticated, remote
    attacker to impact integrity and availability.
    (CVE-2017-3307)

  - An out-of-bounds read error exists in the OpenSSL
    component when handling packets using the
    CHACHA20/POLY1305 or RC4-MD5 ciphers. An
    unauthenticated, remote attacker can exploit this, via
    specially crafted truncated packets, to cause a denial
    of service condition. (CVE-2017-3731)

  - A carry propagating error exists in the OpenSSL
    component in the x86_64 Montgomery squaring
    implementation that may cause the BN_mod_exp() function
    to produce incorrect results. An unauthenticated, remote
    attacker with sufficient resources can exploit this to
    obtain sensitive information regarding private keys.
    (CVE-2017-3732)

  - A remote code execution vulnerability exists in the
    Apache Struts component in the Jakarta Multipart parser
    due to improper handling of the Content-Type,
    Content-Disposition, and Content-Length headers.
    An unauthenticated, remote attacker can exploit this,
    via a specially crafted header value in the HTTP
    request, to execute arbitrary code. (CVE-2017-5638)");
  # https://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.html#AppendixMSQL
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d679be85");
  # http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html#AppendixMSQL
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?50229a1a");
  # https://www.oracle.com/ocom/groups/public/@otn/documents/webcontent/3681811.xml
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eb4db3c7");
  script_set_attribute(attribute:"see_also", value:"https://support.oracle.com/rs?type=doc&id=2244179.1");
  script_set_attribute(attribute:"see_also", value:"https://support.oracle.com/rs?type=doc&id=2279658.1");
  script_set_attribute(attribute:"see_also", value:"http://blog.talosintelligence.com/2017/03/apache-0-day-exploited.html");
  # https://threatpost.com/apache-struts-2-exploits-installing-cerber-ransomware/124844/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?77e9c654");
  script_set_attribute(attribute:"solution", value:
"Upgrade to MySQL Enterprise Monitor version 3.1.7.8023 / 3.2.7.1204 /
3.3.3.1199 or later as referenced in the April 2017 Oracle Critical
Patch Update advisory.

Note that the 3.2.x version was fixed for the CVE-2016-4436
vulnerability in version 3.2.6.1182.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:X");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-5638");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Apache Struts Jakarta Multipart Parser OGNL Injection');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/21");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:mysql_enterprise_monitor");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mysql_enterprise_monitor_web_detect.nasl");
  script_require_keys("installed_sw/MySQL Enterprise Monitor", "Settings/ParanoidReport");
  script_require_ports("Services/www", 18443);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("install_func.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

app  = "MySQL Enterprise Monitor";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:18443);

install = get_single_install(app_name:app, port:port, exit_if_unknown_ver:TRUE);
version = install['version'];
install_url = build_url(port:port, qs:"/");

fixes = {"^3.3": "3.3.3.1199",
         "^3.2": "3.2.7.1204",
         "^3.1": "3.1.7.8023"};

vuln = FALSE;
fix = '';
foreach (prefix in keys(fixes))
{
  if (version =~ prefix && ver_compare(ver:version,
                                       fix:fixes[prefix],
                                       strict:FALSE) < 0)
  { 
    vuln = TRUE;
    fix = fixes[prefix];
    break;
  }
}

if (vuln)
{
  report =
    '\n  URL               : ' + install_url +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix +
    '\n';
  security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);