Vulnerabilities > CVE-2013-4955 - Improper Input Validation vulnerability in Puppet Enterprise

047910
CVSS 5.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
NONE
network
puppet
CWE-20
nessus

Summary

Open redirect vulnerability in the login page in Puppet Enterprise before 3.0.1 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the service parameter.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

NASL familyCGI abuses
NASL idPUPPET_ENTERPRISE_301.NASL
descriptionAccording to its self-reported version number, the Puppet Enterprise install on the remote host is a version prior to 3.0.1. As a result, it reportedly has multiple vulnerabilities: - An error exists related to the included Ruby SSL client that could allow man-in-the-middle attacks. (CVE-2013-4073) - An error exists related to the
last seen2020-06-01
modified2020-06-02
plugin id70663
published2013-10-28
reporterThis script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/70663
titlePuppet Enterprise < 3.0.1 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(70663);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");

  script_cve_id(
    "CVE-2013-4073",
    "CVE-2013-4761",
    "CVE-2013-4762",
    "CVE-2013-4955",
    "CVE-2013-4956",
    "CVE-2013-4958",
    "CVE-2013-4959",
    "CVE-2013-4961",
    "CVE-2013-4962",
    "CVE-2013-4963",
    "CVE-2013-4964",
    "CVE-2013-4967",
    "CVE-2013-4968"
  );
  script_bugtraq_id(
    60843,
    61805,
    61806,
    61856,
    61857,
    61859,
    61860,
    61861,
    61862,
    61870,
    61945,
    61949,
    66541
  );

  script_name(english:"Puppet Enterprise < 3.0.1 Multiple Vulnerabilities");
  script_summary(english:"Checks puppet enterprise version");

  script_set_attribute(
    attribute:"synopsis",
    value:"A web application on the remote host has multiple vulnerabilities."
  );
  script_set_attribute(
    attribute:"description",
    value:
"According to its self-reported version number, the Puppet Enterprise
install on the remote host is a version prior to 3.0.1.  As a result,
it reportedly has multiple vulnerabilities:

  - An error exists related to the included Ruby SSL client
    that could allow man-in-the-middle attacks.
    (CVE-2013-4073)

  - An error exists related to the 'resource_type' service
    that could allow a local attacker to cause arbitrary
    Ruby files to be executed. (CVE-2013-4761)

  - Multiple session vulnerabilities exist that could
    allow an attacker to hijack an arbitrary session and
    gain unauthorized access. (CVE-2013-4762, CVE-2013-4964)

  - An error exists related to 'Puppet Module Tool' (PMT)
    and improper permissions. (CVE-2013-4956)

  - Multiple security bypass vulnerabilities exist that
    could allow an attacker to gain unauthorized access
    and perform sensitive transactions. (CVE-2013-4958,
    CVE-2013-4962)

  - Multiple information disclosure vulnerabilities exist
    that could allow an attacker to access sensitive
    information such as server software versions, MAC
    addresses, SSH keys, and database passwords.
    (CVE-2013-4959, CVE-2013-4961, CVE-2013-4967)

  - An open-redirection vulnerability exists that could
    allow an attacker to attempt a phishing attack.
    (CVE-2013-4955)

  - Clickjacking and cross-site-scripting vulnerabilities
    exist that could allow an attacker to trick users into
    sending them sensitive information such as passwords.
    (CVE-2013-4968)

  - A cross-site request forgery vulnerability exists that
    could allow an attacker to manipulate a logged in user's
    browser to perform sensitive transactions on the user's
    behalf. (CVE-2013-4963)"
  );
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4073");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4761");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4762");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4955");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4956");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4958");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4959");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4961");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4962");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4963");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4964");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4967");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/cve-2013-4968");
  script_set_attribute(attribute:"solution", value:"Upgrade to Puppet Enterprise 3.0.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/08/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/08/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/28");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:puppetlabs:puppet");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");

  script_dependencies("puppet_rest_detect.nasl");
  script_require_keys("puppet/rest_port");

  exit(0);
}

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

##
# checks if the given version falls between the given bounds, and
# generates plugin output if it does
#
# @anonparam ver version to check
# @anonparam fix first fixed version
# @anonparam min_ver the lowest/earliest vulnerable version, relative to 'fix' (optional)
#
# @return plugin output if 'ver' is vulnerable relative to 'fix' and/or 'min_ver',
#         NULL otherwise
##
function _check_version(enterprise)
{
  local_var ver, fix, min_ver, major_ver, report;
  ver = _FCT_ANON_ARGS[0];
  fix = _FCT_ANON_ARGS[1];
  min_ver = _FCT_ANON_ARGS[2];

  if (
    # no lower bound
    (isnull(min_ver) &&
     ver_compare(ver:ver, fix:fix, strict:FALSE) < 0) ||

    # lower bound
    (!isnull(min_ver) &&
     ver_compare(ver:ver, fix:fix, strict:FALSE) < 0 &&
     ver_compare(ver:ver, fix:min_ver, strict:FALSE) >= 0)
  )
  {
    if (enterprise)
    {
      report =
        '\n  Installed version : Puppet Enterprise ' + ver +
        '\n  Fixed version : Puppet Enterprise ' + fix + '\n';
    }
    else
      report = NULL;
  }
  else report = NULL;

  return report;
}

port = get_kb_item_or_exit('puppet/rest_port');
ver = get_kb_item_or_exit('puppet/' + port + '/version');
report = NULL;
vuln = FALSE;

if ('Enterprise' >< ver)
{
  # convert something like
  #   2.7.19 (Puppet Enterprise 2.7.0)
  # to
  #   2.7.0
  match = eregmatch(string:ver, pattern:"Enterprise ([0-9.]+)\)");
  if (isnull(match))
    audit(AUDIT_UNKNOWN_WEB_APP_VER, 'Puppet Enterprise', build_url(port:port));
  else
    ver = match[1];

  # Resolved in Puppet Enterprise 3.0.1
  if (report = _check_version(ver, '3.0.1', enterprise:TRUE))
  {
    vuln = TRUE;
  }
}

if (!vuln) audit(AUDIT_LISTEN_NOT_VULN, 'Puppet', port, ver);

set_kb_item(name:'www/'+port+'/XSS', value:TRUE);
set_kb_item(name:"www/"+port+"/XSRF", value:TRUE);

if (report_verbosity > 0) security_warning(port:port, extra:report);
else security_warning(port);