Vulnerabilities > CVE-2016-1302 - Improper Access Control vulnerability in multiple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
samsung
sun
zyxel
zzinc
cisco
CWE-284
nessus
NVD
Published: 2016-02-07
Updated: 2016-12-06

Summary

Cisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3h) and 1.1 before 1.1(1j) and Nexus 9000 ACI Mode switches with software before 11.0(3h) and 11.1 before 11.1(1j) allow remote authenticated users to bypass intended RBAC restrictions via crafted REST requests, aka Bug ID CSCut12998.

Vulnerable Configurations

Part Description Count
OS
Samsung
1
OS
Sun
1
OS
Zyxel
2
OS
Zzinc
1
OS
Cisco
1
Hardware
Cisco
17

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyCISCO
NASL idCISCO-SA-20160203-APIC.NASL
descriptionThe remote Cisco Nexus 9000 Series device is affected by an access control vulnerability in the Cisco Application Policy Infrastructure Controller (APIC) due to a flaw in the eligibility logic of the role-based access control (RBAC) code. An authenticated, remote attacker can exploit this, via specially crafted representational state transfer (REST) requests to the APIC, to make configuration changes outside of allowed access privileges.
last seen2020-06-01
modified2020-06-02
plugin id88717
published2016-02-12
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/88717
titleCisco Nexus 9000 Series APIC Access Control Vulnerability (CSCut12998)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(88717);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/20");

  script_cve_id("CVE-2016-1302");
  script_bugtraq_id(82549);
  script_xref(name:"CISCO-BUG-ID", value:"CSCut12998");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20160203-apic");

  script_name(english:"Cisco Nexus 9000 Series APIC Access Control Vulnerability (CSCut12998)");
  script_summary(english:"Checks the NX-OS version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The remote Cisco Nexus 9000 Series device is affected by an access
control vulnerability in the Cisco Application Policy Infrastructure
Controller (APIC) due to a flaw in the eligibility logic of the
role-based access control (RBAC) code. An authenticated, remote
attacker can exploit this, via specially crafted representational
state transfer (REST) requests to the APIC, to make configuration
changes outside of allowed access privileges.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160203-apic
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?73afdd7b");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/bugsearch/bug/CSCut12998");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID
CSCut12998.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:L/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-2016-1302");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/02/12");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:nexus_9000");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

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

  script_dependencies("cisco_nxos_version.nasl");
  script_require_keys("Host/Cisco/NX-OS/Version", "Host/Cisco/NX-OS/Device", "Host/Cisco/NX-OS/Model");

  exit(0);
}

include("audit.inc");
include("cisco_func.inc");

device  = get_kb_item_or_exit("Host/Cisco/NX-OS/Device");
model   = get_kb_item_or_exit("Host/Cisco/NX-OS/Model");

# only affects nexus 9000 series systems
if (device != 'Nexus' || model !~ '^9[0-9][0-9][0-9]([^0-9]|$)')
  audit(AUDIT_DEVICE_NOT_VULN, device + ' ' + model);

version = get_kb_item_or_exit("Host/Cisco/NX-OS/Version");

# defensive check for the eregmatches below
if (version !~ "^[0-9.]+\([0-9.]+")
  audit(AUDIT_DEVICE_NOT_VULN, device + ' ' + model, version);

major = eregmatch(pattern:"^([0-9.]+)\(", string:version);
major = major[1];
build = eregmatch(pattern:"^[0-9.]+\(([0-9.]+)", string:version);
build = build[1];

# running software versions prior to 11.0(3h) and 11.1(1j)
if (major == "11.0")
{
  build_fix = "3";
  fix = "11.0(3h)";
}
else if (major == "11.1")
{
  build_fix = "1";
  fix = "11.1(1j)";
}
else
  audit(AUDIT_DEVICE_NOT_VULN, device + ' ' +  model, version);

if (ver_compare(ver:build, fix:build_fix, strict:FALSE) < 0)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Model             : ' + device + ' ' + model +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fix +
      '\n';
    security_hole(port:0, extra:report);
  }
  else security_hole(port:0);
  exit(0);
}
else audit(AUDIT_DEVICE_NOT_VULN, device + ' ' + model, version);

References