[Bug 1864689] Re: openssl in 20.04 can't connect to site that was fine in 19.10 and is fine in Chrome and Firefox

[Jonathan Kamens]

Aha! `curl -v --ciphers 'DEFAULT:@SECLEVEL=1' https://www.toodledo.com/`
works but `curl -v --ciphers 'DEFAULT:@SECLEVEL=2'
https://www.toodledo.com/` fails.

According to
https://www.openssl.org/docs/man1.1.0/man3/SSL_CTX_get_security_level.html,
the default security level for the library is 1 if it isn't specified at
compile time. Has Canonical made a decision to set a higher security
level by default?

Oh, wait, it appears that yes it has. `openssl version -a` says
`-DOPENSSL_TLS_SECURITY_LEVEL=2`.

It appears that this was an intentional change? I question the
advisability of this, especially since it doesn't appear that there's
any way to override it in a configuration file (is there?).

I am not sure it is advisable for command-line tools in the OS to have
stricter security level requirements than users' browsers?

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https://bugs.launchpad.net/bugs/1864689

Title:
  openssl in 20.04 can't connect to site that was fine in 19.10 and is
  fine in Chrome and Firefox

Status in openssl package in Ubuntu:
  New

Bug description:
  openssl in Ubuntu 20.04 (focal) refuses to connect to a web site that
  openssl in Ubuntu 19.10 (eoan), Chrome, and Firefox are all happy to
  connect to.

  Reproduce with: `curl -v https://www.toodledo.com/'

  or: `openssl s_client -connect www.toodledo.com:443`

  or: `python3 -c 'import requests;
  requests.get("https://www.toodledo.com/")'`

  or: `wget https://www.toodledo.com/`

  These worked in Ubuntu 19.10 and don't work in 20.04.

  I've tried all sorts of things to debug this further and I've just run
  into walls. I hope someone who understands more about this stuff will
  be able to figure it out.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: openssl 1.1.1d-2ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu18
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Feb 25 13:01:22 2020
  InstallationDate: Installed on 2019-08-16 (192 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  SourcePackage: openssl
  UpgradeStatus: Upgraded to focal on 2020-01-31 (25 days ago)

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