VDB
CVE-2020-7663
CVE-2020-7663
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 4.53% · 91.2th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
4.53%
91.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | ruby-websocket-extensions | 0, 0.1.2-1 |
| Ubuntu:16.04:LTS | ruby-websocket-extensions | 0, 0.1.2-1 |
| Ubuntu:20.04:LTS | ruby-websocket-extensions | 0, 0.1.2-1 |
Timeline
- Jun 2, 2020 CVE Published
- Sep 17, 2020 CVE Updated
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 1, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
- Sep 6, 2022 EPSS Score
- Jan 9, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-7663 third-party-advisory
- https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions third-party-advisory
- https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b third-party-advisory
- https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2 third-party-advisory
- https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830 third-party-advisory
- https://ubuntu.com/security/notices/USN-4502-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-7663 third-party-advisory