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Uncontrolled Resource Consumption


Severity Medium
Score 6.5/10


quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of "PATH_CHALLENGE" frames. The receiver is supposed to respond to each "PATH_CHALLENGE" frame with a "PATH_RESPONSE" frame. The attacker can prevent the receiver from sending out (the vast majority of) these "PATH_RESPONSE" frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate. This issue affects the versions prior to 0.37.7, 0.38.x prior to 0.38.2, 0.39.x prior to 0.39.4, and 0.40.x prior to 0.40.1.

  • LOW
  • NONE
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  • LOW
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  • HIGH

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

Advisory Timeline

  • Published