FreeBSD : pubcookie-login-server -- XSS vulnerability (855cd9fa-c452-11da-8bff-000ae42e9b93)

2006-05-13T00:00:00
ID FREEBSD_PKG_855CD9FAC45211DA8BFF000AE42E9B93.NASL
Type nessus
Reporter Tenable
Modified 2018-11-10T00:00:00

Description

Nathan Dors of the Pubcookie Project reports :

Multiple non-persistent XSS vulnerabilities were found in the Pubcookie login server's compiled binary 'index.cgi' CGI program. The CGI program mishandles untrusted data when printing responses to the browser. This makes the program vulnerable to carefully crafted requests containing script or HTML. If an attacker can lure an unsuspecting user to visit carefully staged content, the attacker can use it to redirect the user to his or her local Pubcookie login page and attempt to exploit the XSS vulnerabilities.

These vulnerabilities are classified as critical due to the nature and purpose of the Pubcookie login server for user authentication and Web Single Sign-on (SSO). Specific threats include :

  • An attacker who injects malicious script through the vulnerabilities might steal senstive user data including a user's authentication credentials (usernames and passwords);

  • An attacker who injects malicious script through the vulnerabilities might steal private Pubcookie data including a user's authentication assertion ('granting') cookies and SSO ('login') session cookies;

  • An attacker who injects HTML tags through the vulnerabilities might deface a site's Pubcookie login page for a single visit by a single user (i.e. a non-persistent defacement).

At the heart of these threats lies a violation of the user's trust in the Pubcookie login server.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(21462);
  script_version("1.12");
  script_cvs_date("Date: 2018/11/10 11:49:40");

  script_xref(name:"CERT", value:"337585");

  script_name(english:"FreeBSD : pubcookie-login-server -- XSS vulnerability (855cd9fa-c452-11da-8bff-000ae42e9b93)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Nathan Dors of the Pubcookie Project reports :

Multiple non-persistent XSS vulnerabilities were found in the
Pubcookie login server's compiled binary 'index.cgi' CGI program. The
CGI program mishandles untrusted data when printing responses to the
browser. This makes the program vulnerable to carefully crafted
requests containing script or HTML. If an attacker can lure an
unsuspecting user to visit carefully staged content, the attacker can
use it to redirect the user to his or her local Pubcookie login page
and attempt to exploit the XSS vulnerabilities.

These vulnerabilities are classified as *critical* due to the nature
and purpose of the Pubcookie login server for user authentication and
Web Single Sign-on (SSO). Specific threats include :

- An attacker who injects malicious script through the vulnerabilities
might steal senstive user data including a user's authentication
credentials (usernames and passwords);

- An attacker who injects malicious script through the vulnerabilities
might steal private Pubcookie data including a user's authentication
assertion ('granting') cookies and SSO ('login') session cookies;

- An attacker who injects HTML tags through the vulnerabilities might
deface a site's Pubcookie login page for a single visit by a single
user (i.e. a non-persistent defacement).

At the heart of these threats lies a violation of the user's trust in
the Pubcookie login server."
  );
  # https://vuxml.freebsd.org/freebsd/855cd9fa-c452-11da-8bff-000ae42e9b93.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?d9439f3c"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:pubcookie-login-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/03/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"pubcookie-login-server<3.3.0")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");