Vulnerabilities > CVE-2015-5693 - Code Injection vulnerability in Symantec web Gateway

047910
CVSS 7.9 - HIGH
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
MULTIPLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
symantec
CWE-94
nessus

Summary

The management console on Symantec Web Gateway (SWG) appliances with software before 5.2.2 DB 5.0.0.1277 allows remote authenticated users to execute arbitrary commands via vectors related to "traffic capture."

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Nessus

NASL familyCGI abuses
NASL idSYMANTEC_WEB_GATEWAY_SYM1-009.NASL
descriptionAccording to its self-reported version number, the remote web server is hosting a version of Symantec Web Gateway with a database component prior to version 5.0.0.1277. It is, therefore, affected by multiple vulnerabilities : - A flaw exists that allows the bypassing of access redirect restrictions. An authenticated, remote attacker can exploit this to inject commands with elevated privileges. (CVE-2015-5690) - A reflected cross-site scripting vulnerability exists in the management console due to improper validation of user-supplied input. An attacker can exploit this to execute arbitrary script in the user
last seen2020-06-01
modified2020-06-02
plugin id86150
published2015-09-25
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/86150
titleSymantec Web Gateway Database < 5.0.0.1277 Multiple Vulnerabilities (SYM15-009) (credentialed check)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(86150);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/15 20:50:19");

  script_cve_id(
    "CVE-2015-5690",
    "CVE-2015-5691",
    "CVE-2015-5692",
    "CVE-2015-5693",
    "CVE-2015-6547",
    "CVE-2015-6548");
  script_bugtraq_id(
    76725,
    76726,
    76728,
    76729,
    76730,
    76731
  );

  script_name(english:"Symantec Web Gateway Database < 5.0.0.1277 Multiple Vulnerabilities (SYM15-009) (credentialed check)");
  script_summary(english:"Checks the SWG version.");

  script_set_attribute(attribute:"synopsis", value:
"A web security application hosted on the remote web server is affected
by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the remote web server
is hosting a version of Symantec Web Gateway with a database component
prior to version 5.0.0.1277. It is, therefore, affected by multiple
vulnerabilities :

  - A flaw exists that allows the bypassing of access
    redirect restrictions. An authenticated, remote attacker
    can exploit this to inject commands with elevated
    privileges. (CVE-2015-5690)

  - A reflected cross-site scripting vulnerability exists
    in the management console due to improper validation of
    user-supplied input. An attacker can exploit this to
    execute arbitrary script in the user's browser session.
    (CVE-2015-5691)

  - A flaw exists in the admin_messages.php script due to
    improperly sanitizing user-uploaded files. An attacker
    can exploit this to execute arbitrary PHP code via a
    crafted file. (CVE-2015-5692)

  - A flaw exists related to Traffic Capture EoP due to the
    Hostname field in the administrator configuration
    facility not properly sanitizing user-supplied input
    before writing it to the '/etc/sysconfig/network' file,
    which is processed during startup and shutdown. An
    authenticated, remote attacker can exploit this, via a
    crafted hostname, to inject commands which are executed
    with root privileges. (CVE-2015-5693)

  - An unspecified flaw exists exists related to the Boot
    Time EoP. An authenticated, remote attacker can exploit
    this to inject arbitrary commands. (CVE-2015-5647)

  - A flaw exists in the edit_alert.php script due to not
    properly sanitizing user-supplied input to the 'alertid'
    and 'applianceid' GET parameters. An authenticated,
    remote attacker can exploit this to inject or manipulate
    SQL queries, resulting in the disclosure of arbitrary
    data. (CVE-2015-6548)");
  # https://support.symantec.com/en_US/article.SYMSA1332.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?30cc4ace");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-15-443/");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-15-444/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Symantec Web Gateway Database to 5.0.0.1277 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/09/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:symantec:web_gateway");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");

  script_dependencies("symantec_web_gateway_detect.nasl");
  script_require_keys("installed_sw/symantec_web_gateway");
  script_require_ports("Services/www", 443);

  exit(0);
}

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

port = get_http_port(default:443, php:TRUE);
app = 'Symantec Web Gateway';

install = get_single_install(
  app_name : 'symantec_web_gateway',
  port     : port,
  exit_if_unknown_ver : TRUE
);

dir = install['path'];
ver = install['version'];
url = build_url(port:port, qs:dir);

# 5.2.3 is not released, but this is for future-proofing.
fix = '5.2.3';

if (ver_compare(ver:ver, fix:fix, strict:FALSE) >= 0)
{
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app, url, ver);
}


# We don't want to require these keys in the case of versions > 5.2.2
user = get_kb_item_or_exit("http/login");
pass = get_kb_item_or_exit("http/password");

post_data =
"USERNAME="+user+"&PASSWORD="+pass+"&loginBtn=Login";

# Logging in to get the DB version
res = http_send_recv3(
    method      : "POST",
    item        : "/spywall/login.php",
    data        : post_data,
    port        : port,
    follow_redirect: 1,
    content_type: 'application/x-www-form-urlencoded',
    exit_on_fail: TRUE
);

# If the login fails, the server returns a 200, which isn't helpful. We
# need to match content.
if(res[2] !~ "<title>Symantec Web Gateway.*Executive Summary</title>")
  exit(0, "Login for " + app + " failed.");

res2 = http_send_recv3(
    method      : "GET",
    item        : "/spywall/executive_summary.php",
    port        : port,
    exit_on_fail: TRUE
);

db_fix = '5.0.0.1277';
db_ver = NULL;

# This string floats in a large blob of text, anchoring is not going
# to provide any great utility
if("Current Database Version" >< res2[2])
{
  matches = eregmatch(pattern:"Current Database Version: ([0-9.]+);",
                      string: res2[2]);
  db_ver = matches[1];
  if (empty_or_null(db_ver))
    audit(AUDIT_UNKNOWN_WEB_APP_VER, app + " Database", url);
}
else
  audit(AUDIT_UNKNOWN_WEB_APP_VER, app + " Database", url);

report = NULL;

if (ver_compare(ver:db_ver, fix:db_fix, strict:FALSE) < 0)
{
  if (report_verbosity > 0)
  {
     report =
       '\n  URL                           : ' + url +
       '\n  Installed application version : ' + ver +
       '\n  Installed database version    : ' + db_ver +
       '\n  Fixed database version        : ' + db_fix + '\n';
  }

  security_hole(port:port, extra:report);
  exit(0);
}
else
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app + " Database", url, db_ver);