========================================================================== Ubuntu Security Notice USN-4502-1 September 16, 2020
ruby-websocket-extensions vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: websocket-extensions could be made to exhaust the server's capacity to process incoming requests if it received specially crafted requests. Software Description: - ruby-websocket-extensions: Generic extension manager for WebSocket connections Details: It was discovered that websocket-extensions does not properly parse special headers. A remote attacker could use this issue to cause regex backtracking, resulting in a denial of service. (CVE-2020-7663) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: ruby-websocket-extensions 0.1.2-1+deb9u1build0.20.04.1 Ubuntu 18.04 LTS: ruby-websocket-extensions 0.1.2-1+deb9u1build0.18.04.1 Ubuntu 16.04 LTS: ruby-websocket-extensions 0.1.2-1+deb9u1build0.16.04.1 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4502-1 CVE-2020-7663 Package Information: https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.20.04.1 https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.18.04.1 https://launchpad.net/ubuntu/+source/ruby-websocket-extensions/0.1.2-1+deb9u1build0.16.04.1
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