FreeBSD : bsh -- remote code execution vulnerability (9e5bbffc-d8ac-11e5-b2bd-002590263bf5)

2016-02-22T00:00:00
ID FREEBSD_PKG_9E5BBFFCD8AC11E5B2BD002590263BF5.NASL
Type nessus
Reporter Tenable
Modified 2016-10-19T00:00:00

Description

Stian Soiland-Reyes reports :

This release fixes a remote code execution vulnerability that was identified in BeanShell by Alvaro Munoz and Christian Schneider. The BeanShell team would like to thank them for their help and contributions to this fix!

An application that includes BeanShell on the classpath may be vulnerable if another part of the application uses Java serialization or XStream to deserialize data from an untrusted source.

A vulnerable application could be exploited for remote code execution, including executing arbitrary shell commands.

This update fixes the vulnerability in BeanShell, but it is worth noting that applications doing such deserialization might still be insecure through other libraries. It is recommended that application developers take further measures such as using a restricted class loader when deserializing. See notes on Java serialization security XStream security and How to secure deserialization from untrusted input without using encryption or sealing.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2016 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(88877);
  script_version("$Revision: 2.4 $");
  script_cvs_date("$Date: 2016/10/19 14:02:55 $");

  script_cve_id("CVE-2016-2510");

  script_name(english:"FreeBSD : bsh -- remote code execution vulnerability (9e5bbffc-d8ac-11e5-b2bd-002590263bf5)");
  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:
"Stian Soiland-Reyes reports :

This release fixes a remote code execution vulnerability that was
identified in BeanShell by Alvaro Munoz and Christian Schneider. The
BeanShell team would like to thank them for their help and
contributions to this fix!

An application that includes BeanShell on the classpath may be
vulnerable if another part of the application uses Java serialization
or XStream to deserialize data from an untrusted source.

A vulnerable application could be exploited for remote code execution,
including executing arbitrary shell commands.

This update fixes the vulnerability in BeanShell, but it is worth
noting that applications doing such deserialization might still be
insecure through other libraries. It is recommended that application
developers take further measures such as using a restricted class
loader when deserializing. See notes on Java serialization security
XStream security and How to secure deserialization from untrusted
input without using encryption or sealing."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207334"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://github.com/beanshell/beanshell/releases/tag/2.0b6"
  );
  # http://www.freebsd.org/ports/portaudit/9e5bbffc-d8ac-11e5-b2bd-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?07f7653b"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/02/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016 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:"bsh<2.0.b6")) flag++;

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