Aaron Patterson reports :
When parsing certain JSON documents, the JSON gem can be coerced in to creating Ruby symbols in a target system. Since Ruby symbols are not garbage collected, this can result in a denial of service attack.
The same technique can be used to create objects in a target system that act like internal objects. These ‘act alike’ objects can be used to bypass certain security mechanisms and can be used as a spring board for SQL injection attacks in Ruby on Rails.
#%NASL_MIN_LEVEL 70300
#
# (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('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(64652);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id("CVE-2013-0269");
script_name(english:"FreeBSD : Ruby -- Denial of Service and Unsafe Object Creation Vulnerability in JSON (c79eb109-a754-45d7-b552-a42099eb2265)");
script_summary(english:"Checks for updated packages in pkg_info output");
script_set_attribute(
attribute:"synopsis",
value:
"The remote FreeBSD host is missing one or more security-related
updates."
);
script_set_attribute(
attribute:"description",
value:
"Aaron Patterson reports :
When parsing certain JSON documents, the JSON gem can be coerced in to
creating Ruby symbols in a target system. Since Ruby symbols are not
garbage collected, this can result in a denial of service attack.
The same technique can be used to create objects in a target system
that act like internal objects. These 'act alike' objects can be used
to bypass certain security mechanisms and can be used as a spring
board for SQL injection attacks in Ruby on Rails."
);
# https://vuxml.freebsd.org/freebsd/c79eb109-a754-45d7-b552-a42099eb2265.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?6ddb8e17"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:ruby");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:rubygem18-json");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:rubygem18-json_pure");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:rubygem19-json");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:rubygem19-json_pure");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"vuln_publication_date", value:"2013/02/11");
script_set_attribute(attribute:"patch_publication_date", value:"2013/02/16");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/18");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 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:"ruby>=1.9,1<1.9.3.385,1")) flag++;
if (pkg_test(save_report:TRUE, pkg:"rubygem18-json<1.7.7")) flag++;
if (pkg_test(save_report:TRUE, pkg:"rubygem19-json<1.7.7")) flag++;
if (pkg_test(save_report:TRUE, pkg:"rubygem18-json_pure<1.7.7")) flag++;
if (pkg_test(save_report:TRUE, pkg:"rubygem19-json_pure<1.7.7")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
freebsd | freebsd | ruby | p-cpe:/a:freebsd:freebsd:ruby |
freebsd | freebsd | rubygem18-json | p-cpe:/a:freebsd:freebsd:rubygem18-json |
freebsd | freebsd | rubygem18-json_pure | p-cpe:/a:freebsd:freebsd:rubygem18-json_pure |
freebsd | freebsd | rubygem19-json | p-cpe:/a:freebsd:freebsd:rubygem19-json |
freebsd | freebsd | rubygem19-json_pure | p-cpe:/a:freebsd:freebsd:rubygem19-json_pure |
freebsd | freebsd | cpe:/o:freebsd:freebsd |