CVE-2020-15134 Missing TLS certificate verification in Faye
- Published
- Updated
- Exploit status
- Proof-of-concept only
Description
Faye before version 1.4.0, there is a lack of certification validation in TLS handshakes. Faye uses em-http-request and faye-websocket in the Ruby version of its client. Those libraries both use the EM::Connection#start_tls method in EventMachine to implement the TLS handshake whenever a wss: URL is used for the connection. This method does not implement certificate verification by default, meaning that it does not check that the server presents a valid and trusted TLS certificate for the expected hostname. That means that any https: or wss: connection made using these libraries is vulnerable to a man-in-the-middle attack, since it does not confirm the identity of the server it is connected to. The first request a Faye client makes is always sent via normal HTTP, but later messages may be sent via WebSocket. Therefore it is vulnerable to the same problem that these underlying libraries are, and we needed both libraries to support TLS verification before Faye could claim to do the same. Your client would still be insecure if its initial HTTPS request was verified, but later WebSocket connections were not. This is fixed in Faye v1.4.0, which enables verification by default. For further background information on this issue, please see the referenced GitHub Advisory.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rubygems faye(RubyGems) | < 1.4.0 | 1.4.0 |
| rubygems faye(RubyGems) | = 0.1.0 | No fix listed |
| rubygems faye(RubyGems) | = 0.1.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.2.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.3.0 | No fix listed |
| rubygems faye(RubyGems) | = 0.3.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.3.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.3.3 | No fix listed |
| rubygems faye(RubyGems) | = 0.3.4 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.0 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.3 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.4 | No fix listed |
| rubygems faye(RubyGems) | = 0.5.5 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.0 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.3 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.4 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.5 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.6 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.7 | No fix listed |
| rubygems faye(RubyGems) | = 0.6.8 | No fix listed |
| rubygems faye(RubyGems) | = 0.7.0 | No fix listed |
Show 32 more
| Product | Affected versions | Fixed in |
|---|---|---|
| rubygems faye(RubyGems) | = 0.7.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.7.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.0 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.1 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.11 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.2 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.3 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.4 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.5 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.6 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.8 | No fix listed |
| rubygems faye(RubyGems) | = 0.8.9 | No fix listed |
| rubygems faye(RubyGems) | = 1.0.0 | No fix listed |
| rubygems faye(RubyGems) | = 1.0.1 | No fix listed |
| rubygems faye(RubyGems) | = 1.0.3 | No fix listed |
| rubygems faye(RubyGems) | = 1.0.4 | No fix listed |
| rubygems faye(RubyGems) | = 1.1.0 | No fix listed |
| rubygems faye(RubyGems) | = 1.1.1 | No fix listed |
| rubygems faye(RubyGems) | = 1.1.2 | No fix listed |
| rubygems faye(RubyGems) | = 1.1.3 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.0 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.1 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.2 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.3 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.4 | No fix listed |
| rubygems faye(RubyGems) | = 1.2.5 | No fix listed |
| rubygems faye(RubyGems) | = 1.3.0 | No fix listed |
| debian/ruby-faye(Debian:12) | < 1.4.0-1 | 1.4.0-1 |
| faye project faye | < 1.4.0 | 1.4.0 |
| ubuntu/ruby-faye(Ubuntu:24.04) | All versions | No fix listed |
| faye | = < 1.4.0 | No fix listed |
| ubuntu/ruby-faye(Ubuntu:22.04) | All versions | No fix listed |
References
- github.com exploit third-party-advisory vendor-advisory
- github.com
- github.com
- github.com
- github.com patch
- github.com patch
- github.com patch
- blog.jcoglan.com exploit third-party-advisory
- securitylab.github.com vendor-advisory
- www.rubydoc.info
- www.rubydoc.info
- nvd.nist.gov third-party-advisory vendor-advisory
- github.com exploit
- github.com
- Ubuntu CVE tracker vendor-advisory
- www.cve.org
- github.com product
- Debian Security Tracker CVE-2020-15134 vendor-advisory
- bugs.debian.org issue-tracking