Revert to stunnel5

[dankova22]

Revert to stunnel5 to fix mount issues

[k8s-ci-robot]

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[mskanth972]

/ok-to-test

[dankova22]

/test pull-aws-efs-csi-driver-unit

[mskanth972]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dankova22, mskanth972

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[andrewjamesbrown]

@dankova22 @mskanth972 looks like this reverts my PR, but it re-introduces security vulnerabilities back into efs-csi-driver.

I noticed when implementing that PR that the stunnel5 package was removed, and the regular stunnel package is 5.58-1.amzn2023.0.2 (see the release notes.

Checking the version on a container running v2.1.3 confirms this:

% k get pod/efs-csi-node-v9l2t -o yaml | yq '.spec.containers[0].image'
public.ecr.aws/efs-csi-driver/amazon/aws-efs-csi-driver:v2.1.3

% k exec -ti efs-csi-node-v9l2t -- stunnel --version
Defaulted container "efs-plugin" out of: efs-plugin, csi-driver-registrar, liveness-probe
[ ] Initializing inetd mode configuration
[ ] Clients allowed=32000
[.] stunnel 5.58 on x86_64-amazon-linux-gnu platform
[.] Compiled with OpenSSL 3.0.5 5 Jul 2022
[.] Running  with OpenSSL 3.0.8 7 Feb 2023
[.] Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,OCSP,PSK,SNI
[ ] errno: (*__errno_location ())
[!] Invalid configuration file name "--version"
[!] realpath: No such file or directory (2)
command terminated with exit code 1

[dankova22]

Raised an issue with distro team to add stunnel5 to new distros aws/eks-distro-build-tooling#1591

[andrewjamesbrown]

@dankova22 The release note differences indicate that stunnel in AL23 is the same as stunnel5 in AL2, unless I'm misunderstanding something.