![]() ![]() ![]() We can reply to that UDP multicast directly on the same port that the request initiated from, informing this client that we have a shared device. This is the first step in finding and adding Universal Plug and Play (UPNP) devices. The discovery process is handled by Simple Service Discovery Protocol (SSDP), which sends a UDP multicast out to 239.255.255.250 on port 1900. UMS, like many other media servers, will attempt to discover other devices on a local network. UMS version affected: Tested on 7.1.0 (current as of July 2018). Operating Systems affected: Verified Windows 10 (likely all versions) Impact: Information disclosure up to code executionĪffected component: UMS's SSDP discovery / XML parsing UNIVERSAL MEDIA SERVER NOT STARTING 2018 PATCHUMS team responded to notification within an hour, patch in progress. Initiate SMB connections to relay NetNTLM challenge/response and achieve Remote Command Execution in Windows domains.Įxploitation can be demonstrated using evil-ssdp (). Initiate SMB connections to capture NetNTLM challenge/response and crack to clear-text password. Access arbitrary files from the filesystem with the same permission as the user account running UMS. Unauthenticated attackers on the same LAN can use this vulnerability to: The XML parsing engine for Universal Media Server's SSDP/UPNP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Issue: Out-of-Band XXE in Universal Media Server's SSDP Processing ![]()
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