CVE-2020-7663
"Ruby WebSocket-Extensions Regex Backtracking DoS"
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.
INFO
Published Date :
June 2, 2020, 7:15 p.m.
Last Modified :
Jan. 20, 2023, 6:22 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-7663 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-7663
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-7663.
| URL | Resource |
|---|---|
| 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 | Mailing List Third Party Advisory |
| https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830 | Exploit Third Party Advisory |
| https://usn.ubuntu.com/4502-1/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A service to connect people who require snow shoveling assistance with those willing to give it.
Dockerfile Go HTML CSS JavaScript Shell
Awesome information for WebSockets security research
security websocket websockets security-tools websocket-security websockets-security web-application-security
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-7663 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-7663 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jan. 20, 2023
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html Mailing List, Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4502-1/ No Types Assigned https://usn.ubuntu.com/4502-1/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* -
CVE Modified by [email protected]
Sep. 17, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4502-1/ [No Types Assigned] -
CVE Modified by [email protected]
Aug. 19, 2020
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2020/08/msg00031.html [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 04, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions No Types Assigned https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions Third Party Advisory Changed Reference Type https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b No Types Assigned https://github.com/faye/websocket-extensions-ruby/commit/aa156a439da681361ed6f53f1a8131892418838b Patch, Third Party Advisory Changed Reference Type https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2 No Types Assigned https://github.com/faye/websocket-extensions-ruby/security/advisories/GHSA-g6wq-qcwm-j5g2 Third Party Advisory Changed Reference Type https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830 No Types Assigned https://snyk.io/vuln/SNYK-RUBY-WEBSOCKETEXTENSIONS-570830 Exploit, Third Party Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:websocket-extensions_project:websocket-extensions:*:*:*:*:*:ruby:*:* versions up to (excluding) 0.1.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-7663 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-7663
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.65 }} -0.67%
score
0.87840
percentile