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Ubuntu 20.04 LTS: USN-4502-1 Important Alert: Websocket-Extensions DoS

ubuntu
Calendar Grey September 16, 2020
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
websocket-extensions could be made to exhaust the server's capacity to process incoming requests if it received specially crafted requests.

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)

Topics%20covered

Topics Covered

security advisory software issue ubuntu dos websocket-extensions server capacity

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://ubuntu.com/security/notices/USN-4502-1

CVE-2020-7663

Severity
important
Lowest
Low
Medium
High
Critical

September 16, 2020

Topics%20covered

Topics Covered

security advisory software issue ubuntu dos websocket-extensions server capacity

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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