azure-cli: `az container exec` fails with 'certificate verify failed'

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Describe the bug

Command Name az container exec

Errors:

[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)
Traceback (most recent call last):
python3.6/site-packages/knack/cli.py, ln 215, in invoke
    cmd_result = self.invocation.execute(args)
cli/core/commands/__init__.py, ln 654, in execute
    raise ex
cli/core/commands/__init__.py, ln 718, in _run_jobs_serially
    results.append(self._run_job(expanded_arg, cmd_copy))
cli/core/commands/__init__.py, ln 711, in _run_job
    six.reraise(*sys.exc_info())
...
az/lib/python3.6/ssl.py, ln 817, in __init__
    self.do_handshake()
az/lib/python3.6/ssl.py, ln 1077, in do_handshake
    self._sslobj.do_handshake()
az/lib/python3.6/ssl.py, ln 689, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)

To Reproduce:

Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

• Put any pre-requisite steps here…
• az container exec --resource-group {} --name {} --exec-command {}

Expected Behavior

Environment Summary

Linux-4.15.0-1093-azure-x86_64-with-debian-stretch-sid (Cloud Shell)
Python 3.6.10
Installer: DEB

azure-cli 2.11.1

Extensions:
ai-examples 0.2.3

Additional Context