Vulnerabilities > CVE-2012-6119 - Permissions, Privileges, and Access Controls vulnerability in multiple products

047910
CVSS 2.1 - LOW
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
NONE
local
low complexity
candlepinproject
redhat
CWE-264
nessus

Summary

Candlepin before 0.7.24, as used in Red Hat Subscription Asset Manager before 1.2.1, does not properly check manifest signatures, which allows local users to modify manifests.

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-2013-0686.NASL
descriptionRed Hat Subscription Asset Manager 1.2.1, which fixes several security issues, multiple bugs, and adds various enhancements, is now available. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. Red Hat Subscription Asset Manager acts as a proxy for handling subscription information and software updates on client machines. The latest packages for Subscription Asset Manager include a number of security fixes : When a Subscription Asset Manager instance is created, its configuration script automatically creates an RPM of the internal subscription service CA certificate. However, this RPM incorrectly created the CA certificate with file permissions of 0666. This allowed other users on a client system to modify the CA certificate used to trust the remote subscription server. All administrators are advised to update and deploy the subscription service certificate on all systems which use Subscription Asset Manager as their subscription service. This procedure is described in: https://access.redhat.com/knowledge/docs/en-US/ Red_Hat_Subscription_Asset_Manager/1.2/html/Installation_Guide/ sect-Installation_Guide-Administration-Upgrading_Subscription_Asset_Ma nager.html (CVE-2012-6116) Manifest signature checking was not implemented for early versions of Subscription Asset Manager. This meant that a malicious user could edit a manifest file, insert arbitrary data, and successfully upload the edited manifest file into the Subscription Asset Manager server. (CVE-2012-6119) Ruby's documentation generator had a flaw in the way it generated HTML documentation. When a Ruby application exposed its documentation on a network (such as a web page), an attacker could use a specially- crafted URL to open an arbitrary web script or to execute HTML code within the application's user session. (CVE-2013-0256) A timing attack flaw was found in the way rubygem-rack and ruby193-rubygem-rack processed HMAC digests in cookies. This flaw could aid an attacker using forged digital signatures to bypass authentication checks. (CVE-2013-0263) A flaw in rubygem-json allowed remote attacks by creating different types of malicious objects. For example, it could initiate a denial of service (DoS) attack through resource consumption by using a JSON document to create arbitrary Ruby symbols, which were never garbage collected. It could also be exploited to create internal objects which could allow a SQL injection attack. (CVE-2013-0269) A flaw in ActiveRecord in Ruby on Rails allowed remote attackers to circumvent attribute protections and to insert their own crafted requests to change protected attribute values. (CVE-2013-0276) HTML markup was not properly escaped when filling in the username field in the Notifications form of the Subscription Asset Manager UI. This meant that HTML code used in the value was then applied in the UI page when the entry was viewed. This could have allowed malicious HTML code to be entered. The field value is now validated and any HTML tags are escaped. (CVE-2013-1823) These updated packages also include bug fixes and enhancements : * Previously, no SELinux policy for the subscription service was included with the Subscription Asset Manager packages. The candlepin-selinux package is now included with SELinux policies for the subscription server. (BZ#906901) * When attempting to use the subscription service's CA certificate to validate a manifest during import, the comparison failed. The upstream subscription service which generated the manifest is a different service than the local subscription service; thus, they have different CA certificates. This caused importing a manifest to fail with the error 'archive failed signature'. This has been fixed so that the proper certificate is used for verification. (BZ#918778) All users of Subscription Asset Manager are recommended to update to the latest packages.
last seen2017-10-29
modified2014-05-02
plugin id65904
published2013-04-10
reporterTenable
sourcehttps://www.tenable.com/plugins/index.php?view=single&id=65904
titleRHEL 6 : Subscription Asset Manager (RHSA-2013:0686)

Redhat

advisories
rhsa
idRHSA-2013:0686
rpms
  • candlepin-0:0.7.24-1.el6_3
  • candlepin-devel-0:0.7.24-1.el6_3
  • candlepin-selinux-0:0.7.24-1.el6_3
  • candlepin-tomcat6-0:0.7.24-1.el6_3
  • katello-common-0:1.2.1.1-1h.el6_4
  • katello-configure-0:1.2.3.1-4h.el6_4
  • katello-glue-candlepin-0:1.2.1.1-1h.el6_4
  • katello-headpin-0:1.2.1.1-1h.el6_4
  • katello-headpin-all-0:1.2.1.1-1h.el6_4
  • ruby-nokogiri-0:1.5.0-0.9.beta4.el6cf
  • rubygem-actionpack-1:3.0.10-12.el6cf
  • rubygem-activemodel-0:3.0.10-3.el6cf
  • rubygem-activemodel-doc-0:3.0.10-3.el6cf
  • rubygem-delayed_job-0:2.1.4-3.el6cf
  • rubygem-delayed_job-doc-0:2.1.4-3.el6cf
  • rubygem-json-0:1.7.3-2.el6_3
  • rubygem-json-debuginfo-0:1.7.3-2.el6_3
  • rubygem-nokogiri-0:1.5.0-0.9.beta4.el6cf
  • rubygem-nokogiri-debuginfo-0:1.5.0-0.9.beta4.el6cf
  • rubygem-nokogiri-doc-0:1.5.0-0.9.beta4.el6cf
  • rubygem-rack-1:1.3.0-4.el6cf
  • rubygem-rails_warden-0:0.5.5-2.el6cf
  • rubygem-rails_warden-doc-0:0.5.5-2.el6cf
  • rubygem-rdoc-0:3.8-6.el6cf
  • rubygem-rdoc-doc-0:3.8-6.el6cf
  • thumbslug-0:0.0.28.1-1.el6_4
  • thumbslug-selinux-0:0.0.28.1-1.el6_4