Vulnerabilities > CVE-2013-3630 - Code Injection vulnerability in Moodle

047910
CVSS 4.6 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
SINGLE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
high complexity
moodle
CWE-94
nessus
exploit available
metasploit

Summary

Moodle through 2.5.2 allows remote authenticated administrators to execute arbitrary programs by configuring the aspell pathname and then triggering a spell-check operation within the TinyMCE editor.

Vulnerable Configurations

Part Description Count
Application
Moodle
144

Common Attack Pattern Enumeration and Classification (CAPEC)

  • 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.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Exploit-Db

descriptionMoodle Remote Command Execution. CVE-2013-3630. Remote exploit for linux platform
idEDB-ID:29324
last seen2016-02-03
modified2013-10-31
published2013-10-31
reportermetasploit
sourcehttps://www.exploit-db.com/download/29324/
titleMoodle Remote Command Execution

Metasploit

descriptionMoodle allows an authenticated user to define spellcheck settings via the web interface. The user can update the spellcheck mechanism to point to a system-installed aspell binary. By updating the path for the spellchecker to an arbitrary command, an attacker can run arbitrary commands in the context of the web application upon spellchecking requests. This module also allows an attacker to leverage another privilege escalation vuln. Using the referenced XSS vuln, an unprivileged authenticated user can steal an admin sesskey and use this to escalate privileges to that of an admin, allowing the module to pop a shell as a previously unprivileged authenticated user. This module was tested against Moodle version 2.5.2 and 2.2.3.
idMSF:EXPLOIT/MULTI/HTTP/MOODLE_CMD_EXEC
last seen2020-06-07
modified2020-02-18
published2013-10-30
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/multi/http/moodle_cmd_exec.rb
titleMoodle Remote Command Execution

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-21312.NASL
    descriptionLatest upstreams, multiple security fixes. Name: CVE-2013-6780 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6780 Assigned: 20131112 Reference: https://yuilibrary.com/support/20131111-vulnerability/ Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 2.5.0 through 2.9.0 allows remote attackers to inject arbitrary web script or HTML via the allowedDomain parameter. Name: CVE-2013-3630 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3630 [Open
    last seen2020-03-17
    modified2013-11-25
    plugin id71063
    published2013-11-25
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/71063
    titleFedora 20 : moodle-2.5.3-1.fc20 (2013-21312)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory 2013-21312.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(71063);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2013-3630", "CVE-2013-6780");
      script_xref(name:"FEDORA", value:"2013-21312");
    
      script_name(english:"Fedora 20 : moodle-2.5.3-1.fc20 (2013-21312)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Latest upstreams, multiple security fixes.
    
    Name: CVE-2013-6780 URL:
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6780 Assigned:
    20131112 Reference:
    https://yuilibrary.com/support/20131111-vulnerability/
    
    Cross-site scripting (XSS) vulnerability in uploader.swf in the
    Uploader component in Yahoo! YUI 2.5.0 through 2.9.0 allows remote
    attackers to inject arbitrary web script or HTML via the allowedDomain
    parameter.
    
    Name: CVE-2013-3630 URL:
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3630
    [Open'>http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3630'>Op
    en URL] Assigned: 20130521 Reference:
    https://community.rapid7.com/community/metasploit/blog/2013/10/30/seve
    n-foss-disclosures-part-one
    [Open'>https://community.rapid7.com/community/metasploit/blog/2013/10/
    30/seven-foss-disclosures-part-one'>Open URL] Reference:
    https://community.rapid7.com/community/metasploit/blog/2013/10/30/seve
    n-tricks-and-treats
    [Open'>https://community.rapid7.com/community/metasploit/blog/2013/10/
    30/seven-tricks-and-treats'>Open URL]
    
    Moodle through 2.5.2 allows remote authenticated administrators to
    execute arbitrary programs by configuring the aspell pathname and then
    triggering a spell-check operation within the TinyMCE editor.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.redhat.com/show_bug.cgi?id=1025655"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.redhat.com/show_bug.cgi?id=1025656"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.redhat.com/show_bug.cgi?id=1030084"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.redhat.com/show_bug.cgi?id=1030085"
      );
      # https://community.rapid7.com/community/metasploit/blog/2013/10/30/seven-foss-disclosures-part-one
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?525142bc"
      );
      # https://community.rapid7.com/community/metasploit/blog/2013/10/30/seven-tricks-and-treats
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?c21b826a"
      );
      # https://lists.fedoraproject.org/pipermail/package-announce/2013-November/122440.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?d830f1df"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://yuilibrary.com/support/20131111-vulnerability/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected moodle package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:P/I:P/A:P");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"metasploit_name", value:'Moodle Remote Command Execution');
      script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:moodle");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:20");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2013/11/14");
      script_set_attribute(attribute:"plugin_publication_date", value:"2013/11/25");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! ereg(pattern:"^20([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 20.x", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    flag = 0;
    if (rpm_check(release:"FC20", reference:"moodle-2.5.3-1.fc20")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
      else security_warning(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "moodle");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-21397.NASL
    descriptionLatest upstreams, multiple security fixes. Name: CVE-2013-6780 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6780 Assigned: 20131112 Reference: https://yuilibrary.com/support/20131111-vulnerability/ Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 2.5.0 through 2.9.0 allows remote attackers to inject arbitrary web script or HTML via the allowedDomain parameter. Name: CVE-2013-3630 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3630 [Open
    last seen2020-03-17
    modified2013-11-25
    plugin id71066
    published2013-11-25
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/71066
    titleFedora 19 : moodle-2.4.7-1.fc19 (2013-21397)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-21354.NASL
    descriptionLatest upstreams, multiple security fixes. Name: CVE-2013-6780 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6780 Assigned: 20131112 Reference: https://yuilibrary.com/support/20131111-vulnerability/ Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 2.5.0 through 2.9.0 allows remote attackers to inject arbitrary web script or HTML via the allowedDomain parameter. Name: CVE-2013-3630 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3630 [Open
    last seen2020-03-17
    modified2013-11-25
    plugin id71065
    published2013-11-25
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/71065
    titleFedora 18 : moodle-2.3.10-1.fc18 (2013-21354)

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/123853/moodle_cmd_exec.rb.txt
idPACKETSTORM:123853
last seen2016-12-05
published2013-10-30
reporterBrandon Perry
sourcehttps://packetstormsecurity.com/files/123853/Moodle-Remote-Command-Execution.html
titleMoodle Remote Command Execution