FreeBSD : py-pylons -- Path traversal bug (f5c58fc1-49c0-11dd-b0ba-00163e000016)

2008-07-08T00:00:00
ID FREEBSD_PKG_F5C58FC149C011DDB0BA00163E000016.NASL
Type nessus
Reporter Tenable
Modified 2013-06-22T00:00:00

Description

Pylons team reports :

The error.py controller uses paste.fileapp to serve the static resources to the browser. The default error.py controller uses os.path.join to combine the id from Routes with the media path. Routes prior to 1.8 double unquoted the PATH_INFO, resulting in FileApp returning files from the filesystem that can be outside of the intended media path directory.

An attacker can craft URL's which utilize the double escaping to pass in a name to the error.py controller which contains a leading slash thus escaping the intended media path and serving files from any location on the filesystem that the Pylons application has access to.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2013 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(33420);
  script_version("$Revision: 1.8 $");
  script_cvs_date("$Date: 2013/06/22 00:15:01 $");

  script_name(english:"FreeBSD : py-pylons -- Path traversal bug (f5c58fc1-49c0-11dd-b0ba-00163e000016)");
  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:
"Pylons team reports :

The error.py controller uses paste.fileapp to serve the static
resources to the browser. The default error.py controller uses
os.path.join to combine the id from Routes with the media path. Routes
prior to 1.8 double unquoted the PATH_INFO, resulting in FileApp
returning files from the filesystem that can be outside of the
intended media path directory.

An attacker can craft URL's which utilize the double escaping to pass
in a name to the error.py controller which contains a leading slash
thus escaping the intended media path and serving files from any
location on the filesystem that the Pylons application has access to."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://wiki.pylonshq.com/display/pylonsdocs/0.9.6.2"
  );
  # http://www.freebsd.org/ports/portaudit/f5c58fc1-49c0-11dd-b0ba-00163e000016.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?169b48bb"
  );
  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:py24-pylons");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2008/05/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2008/07/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/07/08");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2013 Tenable Network Security, Inc.");
  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:"py24-pylons<0.9.6.2")) 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");