Infinite Queue of Pending Frames in Yamux: A Memory-Based Attack

CVE-2024-32984

What is CVE-2024-32984?

The Yamux stream multiplexer, implemented in Rust, is vulnerable to a remote memory exhaustion issue that can significantly impact node performance. This vulnerability arises from an unbounded vector used for storing pending frames. When new frames are required to be sent, they are appended to this vector; however, if a malicious actor exploits this vulnerability by manipulating TCP's receive window, they can prevent the victim node from sending out any data. As a result, the vector of pending frames can grow uncontrollably, consuming all available memory resources on the victim's system. Ultimately, this could lead to the termination of the affected process by the operating system, creating a denial-of-service condition. Urgent attention and patching are recommended to mitigate potential exploitation.

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