Vulnerabilities > CVE-2013-6455 - Information Exposure vulnerability in Mediawiki

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
low complexity
mediawiki
CWE-200
nessus

Summary

The CentralAuth extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to obtain usernames via vectors related to writing the names to the DOM of a page.

Vulnerable Configurations

Part Description Count
Application
Mediawiki
225

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

NASL familyCGI abuses
NASL idMEDIAWIKI_1_19_10.NASL
descriptionAccording to its version number, the instance of MediaWiki running on the remote host is affected by the following vulnerabilities : - Escape sequences are not properly sanitized when passed to the
last seen2020-06-01
modified2020-06-02
plugin id72370
published2014-02-06
reporterThis script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/72370
titleMediaWiki < 1.19.10 / 1.21.4 / 1.22.1 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(72370);
  script_version("1.13");
  script_cvs_date("Date: 2019/11/26");

  script_cve_id(
    "CVE-2013-4570",
    "CVE-2013-4571",
    "CVE-2013-4574",
    "CVE-2013-6451",
    "CVE-2013-6452",
    "CVE-2013-6453",
    "CVE-2013-6454",
    "CVE-2013-6455",
    "CVE-2013-6472",
    "CVE-2014-3454"
  );
  script_bugtraq_id(64966, 65003, 67522);

  script_name(english:"MediaWiki < 1.19.10 / 1.21.4 / 1.22.1 Multiple Vulnerabilities");
  script_summary(english:"Checks version of MediaWiki.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains an application that is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its version number, the instance of MediaWiki running on
the remote host is affected by the following vulnerabilities :

  - Escape sequences are not properly sanitized when passed
    to the 'Sanitizer::checkCss' class, which allows a
    remote attacker to conduct cross-site scripting attacks.
    (CVE-2013-6451)

  - An input validation error exists in the
    'XmlTypeCheck.php' script in uploaded SVG files that
    contain external style sheets, which allows a remote
    attacker to conduct cross-site scripting attacks.
    (CVE-2013-6452)

  - Input validation by the checkSvgScriptCallback()
    function is bypassed in the 'UploadBase.php' script
    when an SVG file with invalid XML is uploaded. This
    can result in malicious code execution. (CVE-2013-6453)

  - An input validation error exists in the 'Sanitizer.php'
    script when input is submitted to the '-o-link'
    attribute, which allows cross-site scripting attacks in
    Opera 12. (CVE-2013-6454)

  - An information disclosure vulnerability exists in the
    log API, Enhanced Recent Changes feature, and users'
    watchlists that allows deleted log entries to be viewed.
    (CVE-2013-6472)

Additionally, the following extensions contain vulnerabilities but
are not enabled or installed by default (unless otherwise noted) :

  - The TimedMediaHandler extension is affected by a
    cross-site scripting vulnerability due to the lack of
    input validation of the 'data-videopayload' attribute
    in the 'mw.PopUpThumbVideo.js' script. (CVE-2013-4574)

  - The Scribuntu extension is affected by a NULL pointer
    dereference and buffer overflow flaw in the
    implementation of the 'luasandbox' PHP extension that
    can lead to a denial of service or arbitrary code
    execution. (CVE-2013-4570, CVE-2013-4571)

  - The CentralAuth extension is affected by an information
    disclosure vulnerability due to the insertion of a
    username into the page's DOM. (CVE-2013-6455)

  - The Semantic Forms extension is affected by a cross-site
    request forgery (XSRF) vulnerability due to the lack of
    token validation in the 'Special:CreateCategory' page.
    (CVE-2014-3454)

Note that Nessus has not tested for these issues but has instead
relied on the application's self-reported version number.");
  # https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-January/000138.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?11acd3f1");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.19#MediaWiki_1.19.10");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.20#MediaWiki_1.21.4");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.22#MediaWiki_1.22.1");
  script_set_attribute(attribute:"solution", value:
"Upgrade to MediaWiki version 1.19.10 / 1.21.4 / 1.22.1 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:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2013-6453");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/06/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/02/06");

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

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

  script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mediawiki_detect.nasl");
  script_require_keys("Settings/ParanoidReport", "installed_sw/MediaWiki", "www/PHP");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

app = "MediaWiki";
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
);
version = install['version'];
install_url = build_url(qs:install['path'], port:port);

if (report_paranoia < 2) audit(AUDIT_PARANOID);

if (
  version =~ "^1\.19\.[0-9]([^0-9]|$)" ||
  version =~ "^1\.21\.[0-3]([^0-9]|$)" ||
  version =~ "^1\.22\.[0]([^0-9]|$)"
)
{
  set_kb_item(name:'www/'+port+'/XSS', value:TRUE);
  set_kb_item(name:'www/'+port+'/XSRF', value:TRUE);

  if (report_verbosity > 0)
  {
    report =
      '\n  URL               : ' + install_url +
      '\n  Installed version : ' + version +
      '\n  Fixed versions    : 1.19.10 / 1.21.4 / 1.22.1' +
      '\n';
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);