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.
CVE-2020-7663 - High Severity Vulnerability
Library home page: https://rubygems.org/gems/websocket-extensions-0.1.2.gem
Path to dependency file: /Gemfile.lock
Path to vulnerable library: /var/lib/gems/2.3.0/cache/websocket-extensions-0.1.2.gem
Dependency Hierarchy: - rails-5.0.0.gem (Root Library) - actioncable-5.0.0.gem - websocket-driver-0.6.4.gem - :x: **websocket-extensions-0.1.2.gem** (Vulnerable Library)
Found in base branch: master
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.
Publish Date: 2020-06-02
URL: CVE-2020-7663
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7663
Release Date: 2020-09-17
Fix Resolution: websocket-extensions:0.1.5
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