Cisco Prime LAN Management Solution Java Object Deserialization RCE (CSCux34647)

2017-05-02T00:00:00
ID CISCO_PRIME_LMS_JAVA_DESER.NASL
Type nessus
Reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-05-02T00:00:00

Description

The Cisco Prime Lan Management Solution (LMS) running on the remote web server is affected by a remote code execution vulnerability due to unsafe deserialize calls of unauthenticated Java objects to the Apache Commons Collections (ACC) library. An unauthenticated, remote attacker can exploit this, by sending a crafted RMI request, to execute arbitrary code on the target host.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99934);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id("CVE-2015-6420");
  script_bugtraq_id(78872);
  script_xref(name:"CISCO-BUG-ID", value:"CSCux34647");
  script_xref(name:"CERT", value:"576313");

  script_name(english:"Cisco Prime LAN Management Solution Java Object Deserialization RCE (CSCux34647)");
  script_summary(english:"Sends an unexpected Java object to the RMI registry.");

  script_set_attribute(attribute:"synopsis", value:
"A network management system running on the remote host is affected by
a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Cisco Prime Lan Management Solution (LMS) running on the remote
web server is affected by a remote code execution vulnerability due to
unsafe deserialize calls of unauthenticated Java objects to the Apache
Commons Collections (ACC) library. An unauthenticated, remote attacker
can exploit this, by sending a crafted RMI request, to execute
arbitrary code on the target host.");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCux34647");
  # https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9c6d83db");
  script_set_attribute(attribute:"solution", value:
"No release is planned by the vendor to fix this vulnerability.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-6420");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/01/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:prime_lan_management_solution");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_prime_lms_web_detect.nasl", "rmiregistry_detect.nasl");
  script_require_keys("installed_sw/cisco_lms");
  script_require_ports("Services/rmi_registry");

  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");
include("byte_func.inc");
include("audit.inc");
include("rmi.inc");

appname = 'cisco_lms';
get_install_count(app_name:appname, exit_if_zero:TRUE);
port = get_service(svc:"rmi_registry", ipproto:"tcp", exit_on_fail:TRUE);
soc = rmi_connect(port:port);

# Due to the nature of this exploit, we can't see the result of the
# commands we execute. However, successful execution of our command
# will always result in a specific exception being sent back to us.
# This object (CommonCollections1) executes 'whoami' and we look
# for the exception that indicates successful deserialization
request = 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send(socket:soc, data:request);
res = recv(socket:soc, length:0x1000, min:0x800);
close(soc);

if (isnull(res) || "Integer cannot be cast to java.util.Set" >!< res)
{
  audit(AUDIT_INST_VER_NOT_VULN, appname);
}

report =
  '\nNessus was able to exploit a Java deserialization vulnerability by' +
  '\nsending a crafted Java object.' +
  '\n';
security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);