FreeBSD: VID-CA8327F7-A5A5-11EA-A860-08002728F74C (CVE-2020-7663): websocket-extensions -- ReDoS vulnerability
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.
Solution(s)
- freebsd-upgrade-package-rubygem-websocket-extensions
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