Vulnerabilities > CVE-2018-10843 - Incorrect Permission Assignment for Critical Resource vulnerability in Redhat Openshift Container Platform

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
redhat
CWE-732
critical
nessus
NVD
Published: 2018-07-02
Updated: 2019-10-09

Summary

source-to-image component of Openshift Container Platform before versions atomic-openshift 3.7.53, atomic-openshift 3.9.31 is vulnerable to a privilege escalation which allows the assemble script to run as the root user in a non-privileged container. An attacker can use this flaw to open network connections, and possibly other actions, on the host which are normally only available to a root user.

Vulnerable Configurations

Part Description Count
Application
Redhat
20

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing Functionality Not Properly Constrained by ACLs
    In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
  • Privilege Abuse
    An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.
  • Directory Indexing
    An adversary crafts a request to a target that results in the target listing/indexing the content of a directory as output. One common method of triggering directory contents as output is to construct a request containing a path that terminates in a directory name rather than a file name since many applications are configured to provide a list of the directory's contents when such a request is received. An adversary can use this to explore the directory tree on a target as well as learn the names of files. This can often end up revealing test files, backup files, temporary files, hidden files, configuration files, user accounts, script contents, as well as naming conventions, all of which can be used by an attacker to mount additional attacks.
  • 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.
  • Exploiting Incorrectly Configured Access Control Security Levels
    An attacker exploits a weakness in the configuration of access controls and is able to bypass the intended protection that these measures guard against and thereby obtain unauthorized access to the system or network. Sensitive functionality should always be protected with access controls. However configuring all but the most trivial access control systems can be very complicated and there are many opportunities for mistakes. If an attacker can learn of incorrectly configured access security settings, they may be able to exploit this in an attack. Most commonly, attackers would take advantage of controls that provided too little protection for sensitive activities in order to perform actions that should be denied to them. In some circumstances, an attacker may be able to take advantage of overly restrictive access control policies, initiating denial of services (if an application locks because it unexpectedly failed to be granted access) or causing other legitimate actions to fail due to security. The latter class of attacks, however, is usually less severe and easier to detect than attacks based on inadequate security restrictions. This attack pattern differs from CAPEC 1, "Accessing Functionality Not Properly Constrained by ACLs" in that the latter describes attacks where sensitive functionality lacks access controls, where, in this pattern, the access control is present, but incorrectly configured.

Nessus

NASL familyRed Hat Local Security Checks
NASL idREDHAT-RHSA-2018-2013.NASL
descriptionRed Hat OpenShift Container Platform release 3.9.31 is now available with updates to packages and images that address security issues, fix several bugs, and add enhancements. 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. Red Hat OpenShift Container Platform is the company
last seen2020-06-12
modified2018-12-04
plugin id119401
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/119401
titleRHEL 7 : OpenShift Container Platform 3.9 (RHSA-2018:2013)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:2013. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119401);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/11");

  script_cve_id("CVE-2018-1070", "CVE-2018-10843", "CVE-2018-1085");
  script_xref(name:"RHSA", value:"2018:2013");

  script_name(english:"RHEL 7 : OpenShift Container Platform 3.9 (RHSA-2018:2013)");
  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:
"Red Hat OpenShift Container Platform release 3.9.31 is now available
with updates to packages and images that address security issues, fix
several bugs, and add enhancements.

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.

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

This advisory contains the RPM packages for Red Hat OpenShift
Container Platform 3.9.31. See the following advisory for the
container images for this release :

https://access.redhat.com/errata/RHBA-2018:2014

Security Fix(es) :

* routing: Malicious Service configuration can bring down routing for
an entire shard (CVE-2018-1070)

* openshift-ansible: Incorrectly quoted values in etcd.conf causes
disabling of SSL client certificate authentication (CVE-2018-1085)

* source-to-image: Builder images with assembler-user LABEL set to
root allows attackers to execute arbitrary code (CVE-2018-10843)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Red Hat would like to thank David Hocky (Comcast) for reporting
CVE-2018-1085. The CVE-2018-1070 issue was discovered by Mark Chappell
(Red Hat) and the CVE-2018-10843 issue was discovered by Jeremy Choi
(Red Hat).

Space precludes documenting all of the bug fixes and enhancements in
this advisory. See the following Release Notes documentation, which
will be updated shortly for this release, for details about these
changes :

https://docs.openshift.com/container-platform/3.9/release_notes/
ocp_3_9_release_notes.html

All OpenShift Container Platform 3.9 users are advised to upgrade to
these updated packages and images."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://docs.openshift.com/container-platform/3.9/release_notes/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:2013"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-1070"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-1085"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-10843"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  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: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:"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-cluster-capacity");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-descheduler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-docker-excluder");
  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-excluder");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-federation-services");
  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-node-problem-detector");
  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-sdn-ovs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-service-catalog");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-template-service-broker");
  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:atomic-openshift-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atomic-openshift-web-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mysql-apb-role");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openshift-ansible");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openshift-ansible-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openshift-ansible-playbooks");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openshift-ansible-roles");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:prometheus-node-exporter");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/27");
  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-2018:2013";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-clients-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-clients-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-clients-redistributable-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-clients-redistributable-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-cluster-capacity-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-cluster-capacity-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-descheduler-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-descheduler-3.9.13-1.git.267.bb59a3f.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-docker-excluder-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"atomic-openshift-docker-excluder-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-dockerregistry-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-dockerregistry-3.9.31-1.git.351.1bd46ed.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-excluder-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"atomic-openshift-excluder-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-federation-services-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-federation-services-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-master-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-master-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-node-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-node-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-node-problem-detector-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-node-problem-detector-3.9.13-1.git.167.5d6b0d4.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-pod-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-pod-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-sdn-ovs-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-sdn-ovs-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-service-catalog-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-service-catalog-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-template-service-broker-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-template-service-broker-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-tests-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-tests-3.9.31-1.git.0.ef9737b.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-utils-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"atomic-openshift-utils-3.9.31-1.git.34.154617d.el7")) flag++;
  if (rpm_exists(rpm:"atomic-openshift-web-console-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"atomic-openshift-web-console-3.9.31-1.git.246.bded6a4.el7")) flag++;
  if (rpm_check(release:"RHEL7", reference:"mysql-apb-role-1.1.11-1.el7")) flag++;
  if (rpm_exists(rpm:"openshift-ansible-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"openshift-ansible-3.9.31-1.git.34.154617d.el7")) flag++;
  if (rpm_exists(rpm:"openshift-ansible-docs-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"openshift-ansible-docs-3.9.31-1.git.34.154617d.el7")) flag++;
  if (rpm_exists(rpm:"openshift-ansible-playbooks-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"openshift-ansible-playbooks-3.9.31-1.git.34.154617d.el7")) flag++;
  if (rpm_exists(rpm:"openshift-ansible-roles-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", reference:"openshift-ansible-roles-3.9.31-1.git.34.154617d.el7")) flag++;
  if (rpm_exists(rpm:"prometheus-node-exporter-3.9", release:"RHEL7") && rpm_check(release:"RHEL7", cpu:"x86_64", reference:"prometheus-node-exporter-3.9.31-1.git.890.a55de06.el7")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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-2018:2013
rpms
  • atomic-openshift-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-clients-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-clients-redistributable-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-cluster-capacity-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-descheduler-0:3.9.13-1.git.267.bb59a3f.el7
  • atomic-openshift-docker-excluder-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-dockerregistry-0:3.9.31-1.git.351.1bd46ed.el7
  • atomic-openshift-excluder-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-federation-services-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-master-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-node-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-node-problem-detector-0:3.9.13-1.git.167.5d6b0d4.el7
  • atomic-openshift-pod-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-sdn-ovs-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-service-catalog-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-template-service-broker-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-tests-0:3.9.31-1.git.0.ef9737b.el7
  • atomic-openshift-utils-0:3.9.31-1.git.34.154617d.el7
  • atomic-openshift-web-console-0:3.9.31-1.git.246.bded6a4.el7
  • mysql-apb-role-0:1.1.11-1.el7
  • openshift-ansible-0:3.9.31-1.git.34.154617d.el7
  • openshift-ansible-docs-0:3.9.31-1.git.34.154617d.el7
  • openshift-ansible-playbooks-0:3.9.31-1.git.34.154617d.el7
  • openshift-ansible-roles-0:3.9.31-1.git.34.154617d.el7
  • prometheus-node-exporter-0:3.9.31-1.git.890.a55de06.el7

References