Vulnerabilities > CVE-2017-6340 - Cross-site Scripting vulnerability in Trendmicro Interscan web Security Virtual Appliance

047910
CVSS 3.5 - LOW
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
NONE
network
trendmicro
CWE-79
nessus
exploit available

Summary

Trend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 before CP 1746 does not sanitize a rest/commonlog/report/template name field, which allows a 'Reports Only' user to inject malicious JavaScript while creating a new report. Additionally, IWSVA implements incorrect access control that allows any authenticated, remote user (even with low privileges like 'Auditor') to create or modify reports, and consequently take advantage of this XSS vulnerability. The JavaScript is executed when victims visit reports or auditlog pages.

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.

Exploit-Db

descriptionTrend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 SP2 - Multiple Vulnerabilities. CVE-2017-6338,CVE-2017-6339,CVE-2017-6340. Webapps exploit f...
idEDB-ID:42013
last seen2017-05-16
modified2017-01-12
published2017-01-12
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/42013/
titleTrend Micro InterScan Web Security Virtual Appliance (IWSVA) 6.5 SP2 - Multiple Vulnerabilities

Nessus

NASL familyFirewalls
NASL idTRENDMICRO_IWSVA_6_5_1746.NASL
descriptionThe version of Trend Micro InterScan Web Security Virtual Appliance (IWSVA) installed on the remote host is 6.5 prior to 6.5 Build 1746. It is, therefore, affected by multiple vulnerabilities : - Multiple access control issues exist that allow an authenticated, remote attacker with low privileges to modify FTP access control, create or modify reports, or upload an HTTPS decryption certificate and private key. (CVE-2017-6338) - A flaw exists in the management of certain key and certificate data. By default, IWSVA acts as a private certificate authority (CA) and dynamically generates digital certificates that are sent to client browsers to complete a secure passage for HTTPS connections. It also allows administrators to upload their own certificates signed by a root CA. An authenticated, remote attacker with low privileges can download the current CA certificate and private key (either the default ones or ones uploaded by administrators) and use those to decrypt HTTPS traffic, resulting in a loss of confidentiality. Furthermore, the default private key on the appliance is encrypted with a very weak passphrase. The attacker can exploit this to likewise break the encryption protections. (CVE-2017-6339) - A cross-site scripting (XSS) vulnerability exists in rest/commonlog/report/template due to improper sanitization of user-supplied input to the name field. An authenticated, remote attacker with low privileges can exploit this to inject arbitrary JavaScript while creating a new report. Furthermore, due to incorrect access controls, the attacker can exploit this issue to create or modify reports, allowing arbitrary script code to be executed in a user
last seen2020-06-01
modified2020-06-02
plugin id99248
published2017-04-07
reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/99248
titleTrend Micro IWSVA 6.5 < 6.5 Build 1746 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
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It is, therefore, affected by multiple vulnerabilities :

  - Multiple access control issues exist that allow an
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    upload an HTTPS decryption certificate and private key.
    (CVE-2017-6338)

  - A flaw exists in the management of certain key and
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    certificate authority (CA) and dynamically generates
    digital certificates that are sent to client browsers
    to complete a secure passage for HTTPS connections.
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  - A cross-site scripting (XSS) vulnerability exists in
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    An authenticated, remote attacker with low privileges
    can exploit this to inject arbitrary JavaScript while
    creating a new report. Furthermore, due to incorrect
    access controls, the attacker can exploit this issue to
    create or modify reports, allowing arbitrary script
    code to be executed in a user's browser session when
    the user visits report or auditlog pages.
    (CVE-2017-6340)

  - Additionally, other vulnerabilities have been reported,
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  script_set_attribute(attribute:"solution", value:
"Upgrade to Trend Micro IWSVA version 6.5 Build 1746 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
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  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

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  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/28");
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  script_category(ACT_GATHER_INFO);
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  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("trendmicro_iwsva_version.nbin");
  script_require_keys("Host/TrendMicro/IWSVA/version");

  exit(0);
}

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

version  = get_kb_item_or_exit("Host/TrendMicro/IWSVA/version");
build    = get_kb_item("Host/TrendMicro/IWSVA/build");

name = "Trend Micro InterScan Web Security Virtual Appliance";

if (empty_or_null(build))
{
  if (report_paranoia > 0) build = "Unknown";
  else exit(0, "The build number of " + name + " could not be determined.");
}

# Apparently only 6.5 is affected
if (version =~ "^6\.5($|[^0-9])")
{
  fix_ver = '6.5';
  fix_build = 1746;
}
else audit(AUDIT_INST_VER_NOT_VULN, name, version, build);

if (build == "Unknown" || build < fix_build)
{
  port = 0;

  order = make_list("Installed version", "Fixed version");
  report = make_array(
    order[0], version + ' Build ' + build,
    order[1], fix_ver + ' Build ' + fix_build
  );

  report = report_items_str(report_items:report, ordered_fields:order);

  security_report_v4(port:port, extra:report, severity:SECURITY_WARNING, xss:TRUE);
}
else audit(AUDIT_INST_VER_NOT_VULN, name, version, build);

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/142552/tmiwsva65sp2-xssdisclose.txt
idPACKETSTORM:142552
last seen2017-05-17
published2017-05-17
reporterSlidingWindow
sourcehttps://packetstormsecurity.com/files/142552/Trend-Micro-Interscan-Web-Security-Virtual-Appliance-IWSVA-6.5-SP2-XSS-Disclosure.html
titleTrend Micro Interscan Web Security Virtual Appliance (IWSVA) 6.5 SP2 XSS / Disclosure