1. Ubuntu Security Notices
  2. USN-4502-1

USN-4502-1: websocket-extensions vulnerability

Publication date

16 September 2020

Overview

websocket-extensions could be made to exhaust the server’s capacity to process incoming requests if it received specially crafted requests.

Releases

Packages

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)

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

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.04 focal ruby-websocket-extensions –  0.1.2-1+deb9u1build0.20.04.1
18.04 bionic ruby-websocket-extensions –  0.1.2-1+deb9u1build0.18.04.1
16.04 xenial ruby-websocket-extensions –  0.1.2-1+deb9u1build0.16.04.1

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References

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