Vulnerabilities > CVE-2006-2113 - Improper Authentication vulnerability in multiple products

047910
CVSS 6.4 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
dell
fuji-xerox
CWE-287
nessus
NVD
Published: 2006-08-25
Updated: 2018-10-18

Summary

The embedded HTTP server in Fuji Xerox Printing Systems (FXPS) print engine, as used in products including (1) Dell 3000cn through 5110cn and (2) Fuji Xerox DocuPrint firmware before 20060628 and Network Option Card firmware before 5.13, does not properly perform authentication for HTTP requests, which allows remote attackers to modify system configuration via crafted requests, including changing the administrator password or causing a denial of service to the print server.

Vulnerable Configurations

Part Description Count
Hardware
Dell
6
Hardware
Fuji_Xerox
13

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • 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.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.

Nessus

NASL familyCGI abuses
NASL idFXPS_HTTP_AUTH_BYPASS.NASL
descriptionThe remote host appears to be a Fuji Xerox Printing Systems (FXPS) printer. According to its firmware version, the web server component of the FXPS device reportedly fails to authenticate HTTP requests, which could allow a remote attacker to gain administrative control of the affected printer and make unauthorized changes to it, including denying service to legitimate users.
last seen2020-06-01
modified2020-06-02
plugin id22272
published2006-08-29
reporterThis script is Copyright (C) 2006-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/22272
titleFuji Xerox Printing Systems (FXPS) Print Engine Crafted Request HTTP Authentication Bypass
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(22272);
  script_version("1.18");

  script_cve_id("CVE-2006-2113");
  script_bugtraq_id(19716);

  script_name(english:"Fuji Xerox Printing Systems (FXPS) Print Engine Crafted Request HTTP Authentication Bypass");
  script_summary(english:"Gets version of remote printer");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by an authentication bypass isssue." );
 script_set_attribute(attribute:"description", value:
"The remote host appears to be a Fuji Xerox Printing Systems (FXPS)
printer. 

According to its firmware version, the web server component of the
FXPS device reportedly fails to authenticate HTTP requests, which could
allow a remote attacker to gain administrative control of the affected
printer and make unauthorized changes to it, including denying service
to legitimate users." );
 # http://web.archive.org/web/20060901153717/https://itso.iu.edu/20060824_FXPS_Print_Engine_Vulnerabilities
 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f115f81" );
 script_set_attribute(attribute:"see_also", value:"https://www.securityfocus.com/archive/1/444321/30/0/threaded" );
 script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch as referenced in the advisory." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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_set_attribute(attribute:"plugin_publication_date", value: "2006/08/29");
 script_set_attribute(attribute:"vuln_publication_date", value: "2006/08/24");
 script_cvs_date("Date: 2018/11/15 20:50:17");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();


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

  script_copyright(english:"This script is Copyright (C) 2006-2018 Tenable Network Security, Inc.");

  script_dependencies("http_version.nasl");
  script_require_ports("Services/www", 80);

  exit(0);
}

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


port = get_http_port(default:80);


# Make sure it's one of the affected printers.
w = http_send_recv3(method:"GET", item:"/ews/index.htm", port:port);
if (isnull(w)) exit(1, "the web server did not answer");
if ("Server: EWS-NIC" >!< w[1]) exit(0);


# Figure out the model.
model = NULL;
pat = "<title>([^<]+)</title";
matches = egrep(pattern:pat, string:w[2]);
if (matches) {
  foreach match (split(matches)) {
    match = chomp(match);
    model = eregmatch(pattern:pat, string:match);
    if (!isnull(model)) {
      model = model[1];
      break;
    }
  }
}
if (isnull(model)) exit(0);


# And its firmware version.
w = http_send_recv3(method:"GET", item:"/ews/status/infomation.htm", port:port);
if (isnull(w)) exit(1, "the web server did not answer");

ver = NULL;
pat = "Firmware Version<.+>([0-9]+)</td";
matches = egrep(pattern:pat, string:w[2]);
if (matches) {
  foreach match (split(matches)) {
    match = chomp(match);
    ver = eregmatch(pattern:pat, string:match);
    if (!isnull(ver)) {
      ver = ver[1];
      break;
    }
  }
}
if (isnull(ver)) exit(0);


# There's a problem if...
if (
  # it's a Dell Laser printer with an affected firmware version.
  "Dell Laser Printer" >< model &&
  (
    # nb: version numbers come from COMMENT_BUILD header in the patched prn files.
    ("5110cn" >< model && int(substr(ver, 0, 7)) < 20060601) ||
    ("3110cn" >< model && int(substr(ver, 0, 7)) < 20060526) ||
    ("3010cn" >< model && int(substr(ver, 0, 7)) < 20060602) ||
    ("5100cn" >< model && int(substr(ver, 0, 7)) < 20060607) ||
    ("3100cn" >< model && int(substr(ver, 0, 7)) < 20060607) ||
    ("3000cn" >< model && int(substr(ver, 0, 7)) < 20060607)
  )
) security_warning(port);

References