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Ubuntu: USN-4502-1 (CVE-2020-7663): websocket-extensions vulnerability

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Ubuntu: USN-4502-1 (CVE-2020-7663): websocket-extensions vulnerability

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
06/02/2020
Created
09/19/2020
Added
09/17/2020
Modified
09/17/2020

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)

  • ubuntu-upgrade-ruby-websocket-extensions

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