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Juniper Junos Virtualized Environment Guest-To-Host Privilege Escalation (JSA10787)

2017-08-23T00:00:00
ID JUNIPER_JSA10787.NASL
Type nessus
Reporter Tenable
Modified 2017-08-23T00:00:00

Description

According to its self-reported version number and configuration, the remote Juniper Junos device is affected by a privilege escalation vulnerability when running in a virtualized environment due to improper handling of authentication. An attacker on the Junos guest can exploit this to escalate privileges and gain access to the host operating system.

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

include("compat.inc");

if (description)
{
  script_id(102701);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2017/08/23");

  script_cve_id("CVE-2017-2341");
  script_osvdb_id(160899);
  script_xref(name:"JSA", value:"JSA10787");

  script_name(english:"Juniper Junos Virtualized Environment Guest-To-Host Privilege Escalation (JSA10787)");
  script_summary(english:"Checks the Junos version, model, and configuration.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number and configuration, the
remote Juniper Junos device is affected by a privilege escalation
vulnerability when running in a virtualized environment due to
improper handling of authentication. An attacker on the Junos guest
can exploit this to escalate privileges and gain access to the host
operating system.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10787");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant Junos software release referenced in Juniper
security advisory JSA10787. Alternatively, as a workaround, enable
FIPS mode.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/23");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Junos Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017 Tenable Network Security, Inc.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version", "Host/Juniper/model");

  exit(0);
}

include("audit.inc");
include("junos_kb_cmd_func.inc");
include("misc_func.inc");

ver   = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
model = get_kb_item_or_exit('Host/Juniper/model');

if (model !~ "^QFX(5110|5200|10002|10008|10016)" &&
    model !~ "^EX4600[1-4]" &&
    model !~ "^NFX250" &&
    model !~ "^SRX(1500|4100|4200)" &&
    model !~ "^ACX5\d\d\d" &&
    model !~ "^vSRX"
  )
  audit(AUDIT_HOST_NOT, 'an affected model.');

fixes = make_array();

fixes['14.1X53'] = '14.1X53-D40';
fixes['15.1X49'] = '15.1X49-D70';
fixes['15.1'] = '15.1R5';
fixes['16.1'] = '16.1R2';

fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE);

# If FIPS is enabled it isn't vulnerable.
override = TRUE;
buf = junos_command_kb_item(cmd:"show configuration | display set");
if (buf)
{
  override = FALSE;
  pattern = "^set system fips level [1-4]";
  if (junos_check_config(buf:buf, pattern:pattern))
    audit(AUDIT_HOST_NOT, 'vulnerable because it has FIPS mode enabled.');
}

junos_report(ver:ver, fix:fix, model:model, override:override, severity:SECURITY_HOLE);
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