A new vulnerability affect all Linux disro - How can I check if my OS (elementary OS) is affected by this so called "VPN-tunneled TCP connections." Further: How can I turn ON Reverse Path Forwarding as one of the possible mitigation solution to avoid being hihjack?

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Elementary OS actual : Hera 5.1 is based on Ubutnu 18.04.

I think you talked about the vulnerability CVE-2019-14899.

after some research the vulnerability does not affect the version of Ubuntu released before version 19.10, you have more information here :


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