VDB
CVE-2020-7663
CVE-2020-7663
PUBLISHED
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 2.62% · 86.0th percentile
Risk Scores
EPSS Score
2.62%
86.0th 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 |
Exploit Intelligence
- CIRCL seen: CVE-2020-7663 (circl-sighting)
- https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2 (circl)
- https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b (circl)
- https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions (circl)
- https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830 (circl)
- [debian-lts-announce] 20200819 [SECURITY] [DLA 2334-1] ruby-websocket-extensions security update (circl)
- USN-4502-1 (circl)
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 27, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 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