Vulnerabilities > CVE-2016-3738 - Permissions, Privileges, and Access Controls vulnerability in Redhat Openshift 3.2

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
redhat
CWE-264
nessus

Summary

Red Hat OpenShift Enterprise 3.2 does not properly restrict access to STI builds, which allows remote authenticated users to access the Docker socket and gain privileges via vectors related to build-pod.

Vulnerable Configurations

Part Description Count
Application
Redhat
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

NASL familyRed Hat Local Security Checks
NASL idREDHAT-RHSA-2016-1094.NASL
descriptionAn update for atomic-openshift and nodejs-node-uuid is now available for Red Hat OpenShift Enterprise 3.2. In addition, all images have been rebuilt on the new RHEL 7.2.4 base image. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenShift Enterprise by Red Hat is the company
last seen2020-06-12
modified2018-12-04
plugin id119373
published2018-12-04
reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/119373
titleRHEL 7 : Red Hat OpenShift Enterprise 3.2 (RHSA-2016:1094)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2016:1094. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119373);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/11");

  script_cve_id("CVE-2016-3703", "CVE-2016-3708", "CVE-2016-3738");
  script_xref(name:"RHSA", value:"2016:1094");

  script_name(english:"RHEL 7 : Red Hat OpenShift Enterprise 3.2 (RHSA-2016:1094)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"An update for atomic-openshift and nodejs-node-uuid is now available
for Red Hat OpenShift Enterprise 3.2. In addition, all images have
been rebuilt on the new RHEL 7.2.4 base image.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

OpenShift Enterprise by Red Hat is the company's cloud computing
Platform-as-a-Service (PaaS) solution designed for on-premise or
private cloud deployments.

Security Fix(es) :

* A vulnerability was found in the STI build process in OpenShift
Enterprise. Access to STI builds was not properly restricted, allowing
an attacker to use STI builds to access the Docker socket and escalate
their privileges. (CVE-2016-3738)

* An origin validation vulnerability was found in OpenShift
Enterprise. An attacker could potentially access API credentials
stored in a web browser's localStorage if anonymous access was granted
to a service/proxy or pod/ proxy API for a specific pod, and an
authorized access_token was provided in the query parameter.
(CVE-2016-3703)

* A flaw was found in OpenShift Enterprise when multi-tenant SDN is
enabled and a build is run within a namespace that would normally be
isolated from pods in other namespaces. If an s2i build is run in such
an environment the container being built can access network resources
on pods that should not be available to it. (CVE-2016-3708)

The CVE-2016-3738 issue was discovered by David Eads (Red Hat); the
CVE-2016-3703 issue was discovered by Jordan Liggitt (Red Hat); and
the CVE-2016-3708 issue was discovered by Ben Parees (Red Hat).

This update includes the following images :

openshift3/ose:v3.2.0.44-2 openshift3/ose-deployer:v3.2.0.44-2
openshift3/ose-docker-builder:v3.2.0.44-2
openshift3/ose-docker-registry:v3.2.0.44-2
openshift3/ose-f5-router:v3.2.0.44-2
openshift3/ose-haproxy-router:v3.2.0.44-2
openshift3/ose-keepalived-ipfailover:v3.2.0.44-2
openshift3/ose-pod:v3.2.0.44-2 openshift3/ose-recycler:v3.2.0.44-2
openshift3/ose-sti-builder:v3.2.0.44-2
openshift3/jenkins-1-rhel7:1.642-32
openshift3/logging-auth-proxy:3.2.0-4
openshift3/logging-deployment:3.2.0-9
openshift3/logging-elasticsearch:3.2.0-8
openshift3/logging-fluentd:3.2.0-8 openshift3/logging-kibana:3.2.0-4
openshift3/metrics-deployer:3.2.0-6
openshift3/metrics-heapster:3.2.0-6 openshift3/mongodb-24-rhel7:2.4-28
openshift3/mysql-55-rhel7:5.5-26 openshift3/nodejs-010-rhel7:0.10-35
openshift3/node:v3.2.0.44-2 openshift3/openvswitch:v3.2.0.44-2
openshift3/perl-516-rhel7:5.16-38 openshift3/php-55-rhel7:5.5-35
openshift3/postgresql-92-rhel7:9.2-25
openshift3/python-33-rhel7:3.3-35 openshift3/ruby-20-rhel7:2.0-35

aep3_beta/aep:v3.2.0.44-2 aep3_beta/aep-deployer:v3.2.0.44-2
aep3_beta/aep-docker-registry:v3.2.0.44-2
aep3_beta/aep-f5-router:v3.2.0.44-2
aep3_beta/aep-haproxy-router:v3.2.0.44-2
aep3_beta/aep-keepalived-ipfailover:v3.2.0.44-2
aep3_beta/aep-pod:v3.2.0.44-2 aep3_beta/aep-recycler:v3.2.0.44-2
aep3_beta/logging-auth-proxy:3.2.0-4
aep3_beta/logging-deployment:3.2.0-9
aep3_beta/logging-elasticsearch:3.2.0-8
aep3_beta/logging-fluentd:3.2.0-8 aep3_beta/logging-kibana:3.2.0-4
aep3_beta/metrics-deployer:3.2.0-6 aep3_beta/metrics-heapster:3.2.0-6
aep3_beta/node:v3.2.0.44-2 aep3_beta/openvswitch:v3.2.0.44-2"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2016:1094"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-3703"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-3708"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-3738"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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: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:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-clients-redistributable");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-dockerregistry");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-master");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-node");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-pod");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-recycle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-sdn-ovs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nodejs-node-uuid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tuned-profiles-atomic-openshift-node");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2016:1094";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_exists(rpm:"atomic-openshift-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-clients-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-clients-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-clients-redistributable-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-clients-redistributable-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-dockerregistry-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-dockerregistry-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-master-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-master-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-node-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-node-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-pod-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-pod-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-recycle-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-recycle-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-sdn-ovs-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-sdn-ovs-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-tests-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-tests-3.2.0.44-1.git.0.a4463d9.el7")) flag++;
  if (rpm_check(release:"RHEL7", reference:"nodejs-node-uuid-1.4.7-1.el7")) flag++;
  if (rpm_exists(rpm:"tuned-profiles-atomic-openshift-node-3.2", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"tuned-profiles-atomic-openshift-node-3.2.0.44-1.git.0.a4463d9.el7")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "atomic-openshift / atomic-openshift-clients / etc");
  }
}

Redhat

advisories
rhsa
idRHSA-2016:1094
rpms
  • atomic-openshift-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-clients-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-clients-redistributable-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-dockerregistry-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-master-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-node-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-pod-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-recycle-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-sdn-ovs-0:3.2.0.44-1.git.0.a4463d9.el7
  • atomic-openshift-tests-0:3.2.0.44-1.git.0.a4463d9.el7
  • nodejs-node-uuid-0:1.4.7-1.el7
  • tuned-profiles-atomic-openshift-node-0:3.2.0.44-1.git.0.a4463d9.el7