CVE-2020-7663

rubygem-websocket-extensions: ReDoS vulnerability in Sec-WebSocket-Extensions parser

Published Jun 2, 2020 CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-2334-1 ruby-websocket-extensions security update
EUVD EUVD EUVD-2020-0487 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.
Github GHSA Github GHSA GHSA-g6wq-qcwm-j5g2 Regular Expression Denial of Service in websocket-extensions (RubyGem)
Ubuntu USN Ubuntu USN USN-4502-1 websocket-extensions vulnerability
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00585}

epss

{'score': 0.00635}