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Bug 2015326 - Ships a seed pip with vendored ca that can't talk to LE sites
Summary: Ships a seed pip with vendored ca that can't talk to LE sites
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: python-virtualenv
Version: 7.9
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Charalampos Stratakis
QA Contact: Lukáš Zachar
Depends On:
TreeView+ depends on / blocked
Reported: 2021-10-18 23:15 UTC by Ian Wienand
Modified: 2022-01-11 17:42 UTC (History)
6 users (show)

Fixed In Version: python-virtualenv-15.1.0-5.el7_9
Doc Type: No Doc Update
Doc Text:
If this bug requires documentation, please select an appropriate Doc Type value.
Clone Of:
Last Closed: 2022-01-11 17:36:03 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-100178 0 None None None 2021-10-18 23:17:15 UTC
Red Hat Product Errata RHBA-2022:0068 0 None None None 2022-01-11 17:36:06 UTC

Description Ian Wienand 2021-10-18 23:15:02 UTC
python-virtualenv 0:15.1.0-4.el7_7 ships a seed pip that vendors requests with a cacert.pem that can not connect to LetsEncrypt sites after the DST Root CA X3 signature expiration (https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/)

Perhaps not many have noticed because pypi will still work -- but any attempts to connect to sites with certs issued by LetsEncrypt will fail.  For example, below I show an example of getting requirements from opendev.

# yum info python-virtualenv
Name        : python-virtualenv
Arch        : noarch
Version     : 15.1.0
Release     : 4.el7_7

# repoquery --list '*python-virtualenv*'

# virtualenv /tmp/venv

# /tmp/venv/bin/pip install --constraint https://opendev.org/openstack/requirements/raw/stable/stein/upper-constraints.txt --upgrade pip setuptools wheel
Traceback (most recent call last):
  File "/tmp/venv/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/tmp/venv/lib/python2.7/site-packages/pip/commands/install.py", line 312, in run
  File "/tmp/venv/lib/python2.7/site-packages/pip/basecommand.py", line 269, in populate_requirement_set
    session=session, wheel_cache=wheel_cache):
  File "/tmp/venv/lib/python2.7/site-packages/pip/req/req_file.py", line 84, in parse_requirements
    filename, comes_from=comes_from, session=session
  File "/tmp/venv/lib/python2.7/site-packages/pip/download.py", line 417, in get_file_content
    resp = session.get(url)
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 510, in get
    return self.request('GET', url, **kwargs)
  File "/tmp/venv/lib/python2.7/site-packages/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 497, in request
    resp = self.send(prep, **send_kwargs)
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 639, in send
    history = [resp for resp in gen] if allow_redirects else []
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 203, in resolve_redirects
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 618, in send
    r = adapter.send(request, **kwargs)
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 497, in send
    raise SSLError(e, request=request)
SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:618)
You are using pip version 9.0.1, however version 21.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

# ls -l /tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/cacert.pem
-rw-r--r--. 1 root root 344712 Oct 18 23:05 /tmp/venv/lib/python2.7/site-packages/pip/_vendor/requests/cacert.pem

Comment 3 Ian Wienand 2021-10-19 00:16:53 UTC
Additionally, if you do upgrade to the latest pip for python2 (20.3.4) it has switched to certifi which does include this cert -- however now OpenSSL 1.0.2 as on centos doesn't ignore the expired certificate  per https://www.openssl.org/blog/blog/2021/09/13/LetsEncryptRootCertExpire/ -- so it still doesn't work.

This is fairly annoying because even if this package fixes it's vendored cacert.pem file to add the ISRG Root X1 certificate; upgrading pip in a virtualenv will drag back in a version that doesn't work again.

I think to solve this virtualenv would have to vendor a pip 20.3.4 with a fixed cacert.pem for centos7's openssl 1.0.2.  Since pip won't release any new versions for python2, that should keep things working (as long as you don't re-install *over* the seed pip in the virtualenv, I guess?)

Comment 10 Christian Heimes 2021-11-04 14:01:48 UTC
Do you have PyOpenSSL installed on the client? Python's ssl module sets a flag that works around expired root and intermediate certs. PyOpenSSL does not set the flag. If you PyOpenSSL installed, than older requests use PyOpenSSL.

Comment 22 errata-xmlrpc 2022-01-11 17:36:03 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (python-virtualenv bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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