Title: IP access control bypass Product: OpenAsset Digital Asset Management by OpenAsset Vendor Homepage: https://www.openasset.com/ Vulnerable Version: 12.0.19 (Cloud) 11.2.1 (On-premise) Fixed Version: 12.0.20 (Cloud) 11.4.10 (On-premise) CVE Number: CVE-2020-28856 Author: Jack Misiura from The Missing Link Website: https://www.themissinglink.com.au Timeline: 2020-11-14 Disclosed to Vendor 2020-12-04 Vendor releases final patches 2020-12-10 Publication 1. Vulnerability Description The OpenAsset Digital Asset Management web application allowed for spoofing of IP addresses by using X-Forwarded-For header. By default, the web application would allow all traffic in for 127.0.0.1, in order to prevent users from accidentally blocking themselves. 2. PoC Ensure a web application endpoint has been blocked for a specific IP address or alternatively, use a * to block all IP address. Confirm the block is in place by attempting to make a request to the endpoint. Next, add the following to the request header: X-Forwarded-For: 127.0.0.1 The request will not be blocked, allowing access to potentially dangerous endpoints or sensitive data. 3. Solution The vendor provides an updated version (11.4.10) which should be installed immediately. If using the cloud version, the vendor has already updated it. 4. Advisory URL https://www.themissinglink.com.au/security-advisories Jack Misiura Application Security Consultant a 9‑11 Dickson Avenue Artarmon NSW 2064 p 1300 865 865 os +61 2 8436 8585 w <https://www.themissinglink.com.au/> themissinglink.com.au <https://www.linkedin.com/company/the-missing-link-pty-ltd/> <https://www.facebook.com/The-Missing-Link-268395013346228/?ref=bookmarks> <https://twitter.com/TML_au> <https://www.youtube.com/channel/UC2kd4mDmBs3SjW4lX3fFHnQ> <https://www.instagram.com/the_missing_link_it/> <https://forms.office.com/Pages/ResponsePage.aspx?id=XZw2opTdq0iPe7AFmjygSPnqgoo11WREpgCEhJxsz3FUMUxTOUREUVRDTzBNQ0pKTkFaS1lETEFaSi4u> CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify The Missing Link immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of The Missing Link.
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