7.5

CVE-2020-7663

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Websocket-extensions Project ≫ Websocket-extensions SwPlatform ruby Version < 0.1.5
Debian ≫ Debian Linux Version 9.0
Canonical ≫ Ubuntu Linux Version 16.04 SwEdition esm
Canonical ≫ Ubuntu Linux Version 18.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 20.04 SwEdition lts
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 4.53% 0.907
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NIST 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions
Third Party Advisory
https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b
Patch
Third Party Advisory
https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html
Third Party Advisory
Mailing List
https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830
Third Party Advisory
Exploit
https://usn.ubuntu.com/4502-1/
Third Party Advisory