Vulnerabilities > CVE-2012-5395 - Session Fixation vulnerability in MediaWiki CentralAuth Extension

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

include("compat.inc");

if (description)
{
  script_id(63267);
  script_version("1.12");
  script_cvs_date("Date: 2018/11/15 20:50:17");

  script_cve_id("CVE-2012-5391", "CVE-2012-5395");
  script_bugtraq_id(56714, 58019, 68235);

  script_name(english:"MediaWiki < 1.18.6 / 1.19.3 / 1.20.1 Multiple Vulnerabilities");
  script_summary(english:"Checks version of MediaWiki.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP 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 multiple security vulnerabilities :

  - MediaWiki core is vulnerable to session fixation attacks
    that allow an attacker to compromise another user's
    account. (CVE-2012-5391)

  - The MediaWiki CentralAuth Extension is vulnerable to
    session fixation attacks. (CVE-2012-5395)

  - An API feature in version 1.20 allows for HTML code to
    be injected in the 'editfont' option, resulting in
    cross-site scripting (XSS).

  - A PCRE backtrack limit can be exceeded causing history
    pages to fail to display.

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  # https://lists.wikimedia.org/pipermail/mediawiki-announce/2012-November/000122.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cba6a61e");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.18#MediaWiki_1.18.6");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.19#MediaWiki_1.19.3");
  script_set_attribute(attribute:"see_also", value:"https://www.mediawiki.org/wiki/Release_notes/1.20#MediaWiki_1.20.1");
  script_set_attribute(attribute:"solution", value:
"Upgrade to MediaWiki version 1.18.6 / 1.19.3 / 1.20.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  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:"2012/11/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/11/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/12/14");

  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) 2012-2018 Tenable Network Security, Inc.");

  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\.([0-9]|1[0-7])\.") ||
  (version =~ "^1\.18\.([0-5]([^0-9]|$)|6[^0-9])") ||
  (version =~ "^1\.19\.([0-2]([^0-9]|$)|3[^0-9])") ||
  (version =~ "^1\.20\.(0([^0-9]|$)|1[^0-9])")
)
{
  set_kb_item(name:"www/"+port+"/XSS",  value:TRUE);

  if (report_verbosity > 0)
  {
    report =
      '\n  URL               : ' + install_url +
      '\n  Installed version : ' + version +
      '\n  Fixed versions    : 1.18.6 / 1.19.3 / 1.20.1' +
      '\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);