Denial of Service Vulnerability in websocket-extensions Ruby Module by Faye

CVE-2020-7663

What is CVE-2020-7663?

The websocket-extensions Ruby module before version 0.1.5 is susceptible to a Denial of Service attack due to a Regex Backtracking vulnerability. This flaw occurs when an unclosed string parameter value within a header, containing a repetitive two-byte backslash sequence, is parsed. An attacker can exploit this by sending a specially crafted payload with the Sec-WebSocket-Extensions header, potentially causing the server to enter a state of high resource consumption, leading to service disruption. This vulnerability highlights the importance of proper input validation and the need for timely security updates.

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References