CyberRota Analysis
AI-GeneratedThe vulnerability affects libsoup's WebSocket implementation, specifically when using the permessage-deflate extension, which allows for unbounded memory allocation during decompression. This flaw can be exploited by remote, unauthenticated attackers through the use of decompression bombs, leading to Out-of-Memory (OOM) crashes and resulting in Denial of Service (DoS) conditions. Organizations utilizing libsoup for WebSocket communications should prioritize addressing this vulnerability to mitigate potential service disruptions.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop (inflate()) processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via max_incoming_payload_size, it fails to track or limit memory allocation during decompression. A separate check for decompressed size (max_total_message_size) exists but executes only after inflation is complete, and it is entirely disabled by default for client connections. A remote, unauthenticated attacker can exploit this by sending a small, highly compressed payload (a decompression bomb), causing unbounded memory allocation that triggers an Out-of-Memory (OOM) crash and a Denial of Service (DoS).