list_blobs() leading to ServiceRequestError and CERTIFICATE_VERIFY_FAILED

• Package Name: azure-storage-blob
• Package Version: 12.12.0
• Operating System: Ubuntu 20.04
• Python Version: 3.8.9

Describe the bug list_blobs() leads to azure.core.exceptions.ServiceRequestError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate (_ssl.c:1125) on a completely fresh install on an Ubuntu 20.04 VM.

To Reproduce Run this code:

import os

from azure.storage.blob import ContainerClient

def try_list_blobs():
	account_url = "https://mystorageaccount.blob.corewindows.net<SAS>"
	container_name = "mycontainer"

	cc = ContainerClient(account_url, container_name)

	for blob in cc.list_blobs():
		print(blob)

try_list_blobs()

Expected behavior No crash, printing listed blobs

Additional context This happened on 3 separate machines on completely clean python installs. We tried with both correct and incorrect values in account_url and they all yield the same result.

We tried using Shared Access Signatures (as above) and environment credentials.

[l0lawrence]

Thanks for the feedback @vholmer. I will forward this to the storage team.

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