Certbot: ImportError: undefined symbol: EC_GROUP_new_curve_GF2m

[gcstang]

When I try to run ./letsencrypt-auto --help I constantly get this issue, I had several others before but now this one. (The prior ones were related to CentOS 7.2 and the location of ffi header files, I had to create a symbolic link from ln -s /usr/include/ into /usr/include/python2.7/ for these errors)

This used to all work fine but it seems somewhere while doing a renew this was updated and now no longer works. Help would be greatly appreciated.

CentOS Linux release 7.2.1511 (Core)

Checking for new version... Creating virtual environment... Installing Python packages... Installation succeeded. Requesting root privileges to run letsencrypt... /root/.local/share/letsencrypt/bin/letsencrypt --help Traceback (most recent call last): File "/root/.local/share/letsencrypt/bin/letsencrypt", line 9, in <module> load_entry_point('letsencrypt==0.4.2', 'console_scripts', 'letsencrypt')() File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/pkg_resources/__init__.py", line 549, in load_entry_point return get_distribution(dist).load_entry_point(group, name) File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2542, in load_entry_point return ep.load() File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2202, in load return self.resolve() File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2208, in resolve module = __import__(self.module_name, fromlist=['__name__'], level=0) File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/letsencrypt/cli.py", line 21, in <module> import OpenSSL File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module> from OpenSSL import rand, crypto, SSL File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/OpenSSL/rand.py", line 11, in <module> from OpenSSL._util import ( File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/OpenSSL/_util.py", line 6, in <module> from cryptography.hazmat.bindings.openssl.binding import Binding File "/root/.local/share/letsencrypt/lib/python2.7/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 14, in <module> from cryptography.hazmat.bindings._openssl import ffi, lib ImportError: /root/.local/share/letsencrypt/lib/python2.7/site-packages/cryptography/hazmat/bindings/_openssl.so: undefined symbol: EC_GROUP_new_curve_GF2m

[70599]

I have same error now.
How to fix this?

[jcberthon]

Hi @gcstang

Why did you close the issue? There are no solution to that issue that are tracked here, and at least @70599 and I do still have the problem.

Could you reopen the issue? (as sometimes people do not react on old closed issues, I reserve the right to open a new issue which will be a duplicate of that one obviously if there are not activity here anymore :-) )

[jcberthon]

I've found a workaround:

mv ~/.local/share/letsencrypt{,.old}
certbot-auto --help

It will reinstall certbot and it now seems to work.