CyberRota Analysis
AI-GeneratedAn unauthenticated remote actor can exploit a vulnerability in GravitLauncher versions prior to 5.7.12 to send crafted HTTP requests that allow access to sensitive files on the LaunchServer, including authentication keys and database credentials. This exposure can lead to forged administrative access tokens and full authentication bypass, posing a critical risk to systems using the affected Java-based launcher. Organizations utilizing GravitLauncher should prioritize upgrading to version 5.7.12 or later to mitigate this severe security threat.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
GravitLauncher is an open-source Minecraft launcher based on sashok724's v3. Prior to 5.7.12, an unauthenticated remote actor can send a raw HTTP request target without a leading slash to the default LaunchServer file server on port 9274. FileServerHandler.channelRead0 in components/launchserver/src/main/java/pro/gravit/launchserver/socket/handlers/fileserver/FileServerHandler.java strips the first request-target character and resolves the remaining path against updatesDir without re-normalizing and verifying containment. This leaves parent-directory components in a no-leading-slash request and allows reading any file accessible to the LaunchServer process, including .keys/ecdsa_id, .keys/legacySalt, and LaunchServer.json. Disclosure of those files can expose signing keys, refresh-token material, and database credentials, enabling forged administrative access tokens and full authentication bypass. A normalizing L7 proxy may block the primary request form, but direct exposure and L4/TCP proxies remain affected, and netty.fileServerEnabled is enabled by default. This issue is fixed in 5.7.12.