Vulnerabilities > CVE-2016-2935 - Improper Input Validation vulnerability in IBM Bigfix Remote Control 9.1.2

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
ibm
CWE-20
nessus

Summary

The broker application in IBM BigFix Remote Control before 9.1.3 allows remote attackers to cause a denial of service via an invalid HTTP request.

Vulnerable Configurations

Part Description Count
Application
Ibm
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

NASL familyCGI abuses
NASL idIBM_BIGFIX_REMOTE_CONTROL_9_1_3.NASL
descriptionThe version of IBM BigFix Remote Control running on the remote host is prior to 9.1.3. It is, therefore, affected by the multiple vulnerabilities : - Multiple integer overflow conditions exist in the bundled version of OpenSSL in files s3_srvr.c, ssl_sess.c, and t1_lib.c due to improper use of pointer arithmetic for heap-buffer boundary checks. An unauthenticated, remote attacker can exploit this to cause a denial of service. (CVE-2016-2177) - An information disclosure vulnerability exists in the bundled version of OpenSSL in the dsa_sign_setup() function in dsa_ossl.c due to a failure to properly ensure the use of constant-time operations. An unauthenticated, remote attacker can exploit this, via a timing side-channel attack, to disclose DSA key information. (CVE-2016-2178) - A vulnerability exists, known as SWEET32, in the bundled version of OpenSSL in the 3DES and Blowfish algorithms due to the use of weak 64-bit block ciphers by default. A man-in-the-middle attacker who has sufficient resources can exploit this vulnerability, via a
last seen2020-06-01
modified2020-06-02
plugin id96145
published2016-12-27
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/96145
titleIBM BigFix Remote Control < 9.1.3 Multiple Vulnerabilities (SWEET32)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(96145);
  script_version("1.10");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-2177",
    "CVE-2016-2178",
    "CVE-2016-2183",
    "CVE-2016-2928",
    "CVE-2016-2931",
    "CVE-2016-2932",
    "CVE-2016-2933",
    "CVE-2016-2934",
    "CVE-2016-2935",
    "CVE-2016-2943",
    "CVE-2016-6304",
    "CVE-2016-6306"
  );
  script_bugtraq_id(
    91081,
    91319,
    92630,
    93150,
    93153,
    94983,
    94984,
    94986,
    94987,
    94989
  );
  script_xref(name:"IAVB", value:"2016-B-0191");

  script_name(english:"IBM BigFix Remote Control < 9.1.3 Multiple Vulnerabilities (SWEET32)");
  script_summary(english:"Checks the version of IBM BigFix Remote Control.");

  script_set_attribute(attribute:"synopsis", value:
"An application running on the remote web server is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of IBM BigFix Remote Control running on the remote host is
prior to 9.1.3. It is, therefore, affected by the multiple
vulnerabilities :

  - Multiple integer overflow conditions exist in the
    bundled version of OpenSSL in files s3_srvr.c,
    ssl_sess.c, and t1_lib.c due to improper use of pointer
    arithmetic for heap-buffer boundary checks. An
    unauthenticated, remote attacker can exploit this to
    cause a denial of service. (CVE-2016-2177)

  - An information disclosure vulnerability exists in the
    bundled version of OpenSSL in the dsa_sign_setup()
    function in dsa_ossl.c due to a failure to properly
    ensure the use of constant-time operations. An
    unauthenticated, remote attacker can exploit this, via a
    timing side-channel attack, to disclose DSA key
    information. (CVE-2016-2178)

  - A vulnerability exists, known as SWEET32, in the bundled
    version of OpenSSL in the 3DES and Blowfish algorithms
    due to the use of weak 64-bit block ciphers by default.
    A man-in-the-middle attacker who has sufficient
    resources can exploit this vulnerability, via a
    'birthday' attack, to detect a collision that leaks the
    XOR between the fixed secret and a known plaintext,
    allowing the disclosure of the secret text, such as
    secure HTTPS cookies, and possibly resulting in the
    hijacking of an authenticated session. (CVE-2016-2183)

  - An information disclosure vulnerability exists due to
    the inclusion of sensitive information in error logs. An
    authenticated, remote attacker can exploit this to
    disclose information. (CVE-2016-2928)

  - An information disclosure vulnerability exists due to
    the transmission of information in cleartext. A
    man-in-the-middle attacker can exploit this to disclose
    sensitive information. (CVE-2016-2931)

  - An unspecified flaw exists that allows an
    unauthenticated, remote attacker to inject arbitrary XML
    content. (CVE-2016-2932)

  - An information disclosure vulnerability exists due to a
    flaw that allows traversing outside of a restricted
    path. An authenticated, remote attacker can exploit
    this, via a specially crafted request, to disclose
    arbitrary files. (CVE-2016-2933)

  - A cross-site scripting (XSS) vulnerability exists due to
    improper validation of user-supplied input. An
    unauthenticated, remote attacker can exploit this, via a
    specially crafted request, to execute arbitrary script
    code in a user's browser session. (CVE-2016-2934)

  - An unspecified flaw exists that allows an
    unauthenticated, remote attacker to submit invalid HTTP
    requests, resulting in a denial of service condition for
    the broker application. (CVE-2016-2935)

  - An information disclosure vulnerability exists due to
    the storage of information in log files in plaintext. A
    local attacker can exploit this to disclose sensitive
    information. (CVE-2016-2943)

  - A flaw exists in the bundled version of OpenSSL in the
    ssl_parse_clienthello_tlsext() function in t1_lib.c due
    to improper handling of overly large OCSP Status Request
    extensions from clients. An unauthenticated, remote
    attacker can exploit this, via large OCSP Status Request
    extensions, to exhaust memory resources, resulting in a
    denial of service condition. (CVE-2016-6304)

  - An out-of-bounds read error exists the bundled version
    of OpenSSL in the certificate parser that allows an
    unauthenticated, remote attacker to cause a denial of
    service via crafted certificate operations.
    (CVE-2016-6306)

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:"http://www-01.ibm.com/support/docview.wss?uid=swg21991882");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991955");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991892");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991876");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991870");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991960");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991951");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21991896");
  script_set_attribute(attribute:"see_also", value:"https://sweet32.info/");
  script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/blog/blog/2016/08/24/sweet32/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM BigFix Remote Control version 9.1.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-2177");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/27");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:bigfix_remote_control");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:tivoli_remote_control");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

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

  script_dependencies("ibm_bigfix_remote_control.nbin");
  script_require_keys("installed_sw/IBM BigFix Remote Control");
  script_require_ports("Services/www", 80, 443, 9080, 9443);

  exit(0);
}

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

app = "IBM BigFix Remote Control";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);

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

dir = install['path'];
version = install['version'];
url = build_url(qs:dir, port:port);
fix = "9.1.3";

if (version == "9" || version == "9.1") audit(AUDIT_VER_NOT_GRANULAR, app, port, version);

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

security_report_v4(
    port:port,
    severity:SECURITY_HOLE,
    xss:TRUE,
    extra:
      '\n  URL               : ' + url +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fix +
      '\n'
);