Vulnerabilities > CVE-2020-5339 - Cross-site Scripting vulnerability in EMC RSA Authentication Manager

047910
CVSS 4.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
HIGH
Confidentiality impact
LOW
Integrity impact
LOW
Availability impact
NONE
network
low complexity
emc
CWE-79
nessus

Summary

RSA Authentication Manager versions prior to 8.4 P10 contain a stored cross-site scripting vulnerability in the Security Console. A malicious RSA Authentication Manager Security Console administrator with advanced privileges could exploit this vulnerability to store arbitrary HTML or JavaScript code through the Security Console web interface. When other Security Console administrators open the affected report page, the injected scripts could potentially be executed in their browser.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • 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.
  • Embedding Scripts in Non-Script Elements
    This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Cross-Site Scripting in Error Pages
    An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
  • Cross-Site Scripting Using Alternate Syntax
    The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.

Nessus

NASL familyCGI abuses
NASL idEMC_RSA_AM_8_4_P10.NASL
descriptionThe version of EMC RSA Authentication Manager running on the remote host is prior to 8.4 Patch 10. It is, therefore, affected by multiple vulnerabilities: - A cross-site scripting (XSS) vulnerability exists in Security Console due to improper validation of user-supplied input before returning it to users. An authenticated, remote attacker can exploit this to store code in a Security Console report that will then be run by other Security Console administrators accessing a report page. (CVE-2020-5339) - A cross-site scripting (XSS) vulnerability exists in Security Console due to improper validation of user-supplied input before returning it to users. An authenticated, remote attacker can exploit this to store code in a Security Console default security domain mapping that will then be run by other Security Console administrators attempting to change the default security domain mapping. (CVE-2020-5340)
last seen2020-04-30
modified2020-04-02
plugin id135179
published2020-04-02
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/135179
titleEMC RSA Authentication Manager < 8.4 P10 Multiple Vulnerabilites (DSA-2020-052)
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(135179);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/24");

  script_cve_id("CVE-2020-5339");
  script_bugtraq_id(107210);
  script_xref(name:"IAVB", value:"2020-B-0017-S");

  script_name(english:"EMC RSA Authentication Manager < 8.4 P10 Multiple Vulnerabilites (DSA-2020-052)");

  script_set_attribute(attribute:"synopsis", value:
"An application running on the remote host is affected by an insecure
credential management vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of EMC RSA Authentication Manager running on the remote host is 
prior to 8.4 Patch 10. It is, therefore, affected by multiple vulnerabilities:

  - A cross-site scripting (XSS) vulnerability exists in 
    Security Console due to improper validation of 
    user-supplied input before returning it to users. 
    An authenticated, remote attacker can exploit this 
    to store code in a Security Console report that will 
    then be run by other Security Console administrators 
    accessing a report page. (CVE-2020-5339)

  - A cross-site scripting (XSS) vulnerability exists in 
    Security Console due to improper validation of 
    user-supplied input before returning it to users. 
    An authenticated, remote attacker can exploit this 
    to store code in a Security Console default security 
    domain mapping that will then be run by other Security 
    Console administrators attempting to change the default 
    security domain mapping. (CVE-2020-5340)");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2020-5339");
  # https://www.dell.com/support/security/en-ie/details/DOC-111092/DSA-2020-052-RSA&
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e1e30067");
  script_set_attribute(attribute:"solution", value:
"Upgrade to EMC RSA Authentication Manager version 8.4 Patch 10 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
  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:H/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-5339");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/02/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:emc:rsa_authentication_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:rsa:authentication_manager");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("emc_rsa_am_detect.nbin");
  script_require_keys("installed_sw/EMC RSA Authentication Manager");
  script_require_ports("Services/www", 7004);

  exit(0);
}

include('http.inc');
include('vcf.inc');

port = get_http_port(default:7004);
app ='EMC RSA Authentication Manager';
app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

constraints = [
  { 'fixed_version' : '8.4.0.10', 'fixed_display' : '8.4 Patch 10' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_NOTE);