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USN-4502-1: websocket-extensions vulnerability

16 September 2020

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




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
Ubuntu 18.04
Ubuntu 16.04

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