ID CVE-2015-5190
Summary The pcsd web UI in PCS 0.9.139 and earlier allows remote authenticated users to execute arbitrary commands via "escape characters" in a URL.
References
Vulnerable Configurations
  • cpe:2.3:a:pacemaker%2fcorosync_configuration_system_project:pacemaker%2fcorosync_configuration_system:0.9.139
    cpe:2.3:a:pacemaker%2fcorosync_configuration_system_project:pacemaker%2fcorosync_configuration_system:0.9.139
CVSS
Base: 8.5 (as of 04-09-2015 - 09:41)
Impact:
Exploitability:
CWE CWE-77
CAPEC
  • Cause Web Server Misclassification
    An attack of this type exploits a Web server's decision to take action based on filename or file extension. Because different file types are handled by different server processes, misclassification may force the Web server to take unexpected action, or expected actions in an unexpected sequence. This may cause the server to exhaust resources, supply debug or system data to the attacker, or bind an attacker to a remote process. This type of vulnerability has been found in many widely used servers including IIS, Lotus Domino, and Orion. The attacker's job in this case is straightforward, standard communication protocols and methods are used and are generally appended with malicious information at the tail end of an otherwise legitimate request. The attack payload varies, but it could be special characters like a period or simply appending a tag that has a special meaning for operations on the server side like .jsp for a java application server. The essence of this attack is that the attacker deceives the server into executing functionality based on the name of the request, i.e. login.jsp, not the contents.
  • LDAP Injection
    An attacker manipulates or crafts an LDAP query for the purpose of undermining the security of the target. Some applications use user input to create LDAP queries that are processed by an LDAP server. For example, a user might provide their username during authentication and the username might be inserted in an LDAP query during the authentication process. An attacker could use this input to inject additional commands into an LDAP query that could disclose sensitive information. For example, entering a * in the aforementioned query might return information about all users on the system. This attack is very similar to an SQL injection attack in that it manipulates a query to gather additional information or coerce a particular return value.
  • Command Delimiters
    An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
  • File System Function Injection, Content Based
    An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
  • Exploiting Multiple Input Interpretation Layers
    An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
  • Argument Injection
    An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
  • Manipulating Writeable Configuration Files
    Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
NETWORK MEDIUM SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2015-1700.NASL
    description Updated pcs packages that fix two security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Important 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. The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. A command injection flaw was found in the pcsd web UI. An attacker able to trick a victim that was logged in to the pcsd web UI into visiting a specially crafted URL could use this flaw to execute arbitrary code with root privileges on the server hosting the web UI. (CVE-2015-5190) A race condition was found in the way the pcsd web UI backend performed authorization of user requests. An attacker could use this flaw to send a request that would be evaluated as originating from a different user, potentially allowing the attacker to perform actions with permissions of a more privileged user. (CVE-2015-5189) These issues were discovered by Tomas Jelinek of Red Hat. All pcs users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 86502
    published 2015-10-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=86502
    title CentOS 6 / 7 : pcs (CESA-2015:1700)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20150901_PCS_ON_SL6_X.NASL
    description A command injection flaw was found in the pcsd web UI. An attacker able to trick a victim that was logged in to the pcsd web UI into visiting a specially crafted URL could use this flaw to execute arbitrary code with root privileges on the server hosting the web UI. (CVE-2015-5190) A race condition was found in the way the pcsd web UI backend performed authorization of user requests. An attacker could use this flaw to send a request that would be evaluated as originating from a different user, potentially allowing the attacker to perform actions with permissions of a more privileged user. (CVE-2015-5189)
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 85760
    published 2015-09-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=85760
    title Scientific Linux Security Update : pcs on SL6.x, SL7.x i386/x86_64
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2015-1700.NASL
    description Updated pcs packages that fix two security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Important 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. The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. A command injection flaw was found in the pcsd web UI. An attacker able to trick a victim that was logged in to the pcsd web UI into visiting a specially crafted URL could use this flaw to execute arbitrary code with root privileges on the server hosting the web UI. (CVE-2015-5190) A race condition was found in the way the pcsd web UI backend performed authorization of user requests. An attacker could use this flaw to send a request that would be evaluated as originating from a different user, potentially allowing the attacker to perform actions with permissions of a more privileged user. (CVE-2015-5189) These issues were discovered by Tomas Jelinek of Red Hat. All pcs users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 88636
    published 2016-02-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=88636
    title RHEL 6 / 7 : pcs (RHSA-2015:1700)
redhat via4
advisories
bugzilla
id 1252813
title CVE-2015-5190 pcs: Command injection with root privileges.
oval
OR
  • AND
    • comment pcs is earlier than 0:0.9.139-9.el6_7.1
      oval oval:com.redhat.rhsa:tst:20151700005
    • comment pcs is signed with Red Hat redhatrelease2 key
      oval oval:com.redhat.rhsa:tst:20150980006
    • OR
      • comment Red Hat Enterprise Linux 6 Client is installed
        oval oval:com.redhat.rhsa:tst:20100842001
      • comment Red Hat Enterprise Linux 6 Server is installed
        oval oval:com.redhat.rhsa:tst:20100842002
      • comment Red Hat Enterprise Linux 6 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20100842003
      • comment Red Hat Enterprise Linux 6 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20100842004
  • AND
    • OR
      • comment Red Hat Enterprise Linux 7 Client is installed
        oval oval:com.redhat.rhsa:tst:20140675001
      • comment Red Hat Enterprise Linux 7 Server is installed
        oval oval:com.redhat.rhsa:tst:20140675002
      • comment Red Hat Enterprise Linux 7 Workstation is installed
        oval oval:com.redhat.rhsa:tst:20140675003
      • comment Red Hat Enterprise Linux 7 ComputeNode is installed
        oval oval:com.redhat.rhsa:tst:20140675004
    • OR
      • AND
        • comment pcs is earlier than 0:0.9.137-13.el7_1.4
          oval oval:com.redhat.rhsa:tst:20151700013
        • comment pcs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20150980006
      • AND
        • comment python-clufter is earlier than 0:0.9.137-13.el7_1.4
          oval oval:com.redhat.rhsa:tst:20151700011
        • comment python-clufter is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20150980008
rhsa
id RHSA-2015:1700
released 2015-09-01
severity Important
title RHSA-2015:1700: pcs security update (Important)
rpms
  • pcs-0:0.9.139-9.el6_7.1
  • pcs-0:0.9.137-13.el7_1.4
  • python-clufter-0:0.9.137-13.el7_1.4
refmap via4
confirm https://bugzilla.redhat.com/show_bug.cgi?id=1252813
Last major update 04-09-2015 - 11:49
Published 03-09-2015 - 10:59
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