description: websocket-extensions ruby module prior to 0.1.5 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence of a backslash and some other character. This could be abused by an attacker to conduct Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload with the Sec-WebSocket-Extensions header.
problem types: Regular Expression Denial of Service (ReDoS)
affected:
{
product: websocket-extensions (ruby)
vendor: n/a
versions:
status: affected, version: All versions prior to 0.1.5
}