adding event on `Redirect stdout/stdin to network connection in container`

[h4l0gen]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind documentation

/kind tests

/kind feature

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area commands

/area pkg

/area events

What this PR does / why we need it: this PR triggers rule which prevent potential reverse shell or remote code execution. Which issue(s) this PR fixes:

Fixes #184

Special notes for your reviewer:

[poiana]

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[h4l0gen]

Hey @leogr and @FedeDP, just an attempt to redirect Stdout is enough to trigger the rule. In this event:

• Created a listener using the TCP protocol on the container's localhost.
• Established a client connection using a goroutine.
• After accepting the connection, called the redirectStdout function.
• Closed connection and client after excution.

Rule triggered successfully

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Provide feedback via https://github.com/falcosecurity/community.

/lifecycle stale

[leogr]

/remove-lifecycle stale