According to its self-reported version number, the Puppet Enterprise 3.x install on the remote host is prior to 3.1.3. As a result, it is reportedly affected by an error related to the included LibYAML version, the ‘yaml_parser_scan_tag_uri’ function and YAML tag parsing that could allow a heap-based buffer overflow and potentially arbitrary code execution.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(73134);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
script_cve_id("CVE-2013-6393");
script_bugtraq_id(65258);
script_name(english:"Puppet Enterprise 3.x < 3.1.3 LibYAML Heap-Based Buffer Overflow");
script_summary(english:"Checks Puppet Enterprise version");
script_set_attribute(
attribute:"synopsis",
value:
"A web application on the remote host is affected by a buffer overflow
vulnerability."
);
script_set_attribute(
attribute:"description",
value:
"According to its self-reported version number, the Puppet Enterprise
3.x install on the remote host is prior to 3.1.3. As a result, it is
reportedly affected by an error related to the included LibYAML version,
the 'yaml_parser_scan_tag_uri' function and YAML tag parsing that could
allow a heap-based buffer overflow and potentially arbitrary code
execution."
);
# https://groups.google.com/forum/#!searchin/puppet-users/3.1.3/puppet-users/fOH1r1YAho0/-g8mhpce98IJ
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fd5a8021");
script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-6393");
script_set_attribute(attribute:"solution", value:"Upgrade to Puppet Enterprise 3.1.3 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2014/01/29");
script_set_attribute(attribute:"patch_publication_date", value:"2014/02/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/03/21");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:puppetlabs:puppet");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CGI abuses");
script_copyright(english:"This script is Copyright (C) 2014-2021 Tenable Network Security, Inc.");
script_dependencies("puppet_rest_detect.nasl");
script_require_keys("puppet/rest_port");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
##
# checks if the given version falls between the given bounds, and
# generates plugin output if it does
#
# @anonparam ver version to check
# @anonparam fix first fixed version
# @anonparam min_ver the lowest/earliest vulnerable version, relative to 'fix' (optional)
#
# @return plugin output if 'ver' is vulnerable relative to 'fix' and/or 'min_ver',
# NULL otherwise
##
function _check_version(enterprise)
{
local_var ver, fix, min_ver, major_ver, report;
ver = _FCT_ANON_ARGS[0];
fix = _FCT_ANON_ARGS[1];
min_ver = _FCT_ANON_ARGS[2];
if (
# no lower bound
(isnull(min_ver) && ver_compare(ver:ver, fix:fix, strict:FALSE) < 0) ||
# lower bound
(
!isnull(min_ver) &&
ver_compare(ver:ver, fix:fix, strict:FALSE) < 0 &&
ver_compare(ver:ver, fix:min_ver, strict:FALSE) >= 0
)
)
{
if (enterprise)
{
report =
'\n Installed version : Puppet Enterprise ' + ver +
'\n Fixed version : Puppet Enterprise ' + fix + '\n';
}
else report = NULL;
}
else report = NULL;
return report;
}
port = get_kb_item_or_exit('puppet/rest_port');
ver = get_kb_item_or_exit('puppet/' + port + '/version');
report = NULL;
vuln = FALSE;
if ('Enterprise' >< ver)
{
# convert something like
# 2.7.19 (Puppet Enterprise 2.7.0)
# to
# 2.7.0
match = eregmatch(string:ver, pattern:"Enterprise ([0-9.]+)\)");
if (isnull(match)) audit(AUDIT_UNKNOWN_WEB_APP_VER, 'Puppet Enterprise', build_url(port:port));
ver = match[1];
# Resolved in Puppet Enterprise 3.1.3
if (report = _check_version(ver, '3.1.3', '3.0.0', enterprise:TRUE))
{
vuln = TRUE;
}
}
if (!vuln) audit(AUDIT_LISTEN_NOT_VULN, 'Puppet', port, ver);
if (report_verbosity > 0) security_warning(port:port, extra:report);
else security_warning(port);
Vendor | Product | Version | CPE |
---|---|---|---|
puppetlabs | puppet | cpe:/a:puppetlabs:puppet |