enabling ipv6 support broke ipv4 CIDR access list

[dann frazier]

[Impact]
IPs allowed via an IPv4 access list are denied after upgrading from bionic to focal.

[Test Case]
Define an access list, e.g.:

access * {
       trusted 127.0.0.1,10.2.3.4,10.5.6.0/18,10.6.7.0/18;
       allowed 127.0.0.1,10.2.3.4,10.5.6.0/18,10.6.7.0/18;
}

Then try to access a console from a system in the allowed range. It currently fails with:

$ console myhost
10.2.3.4: access from your host refused

[Fix]
https://github.com/bstansell/conserver/commit/0d64aad81233ba021e677d7e8b9a5a7db4d369ea

[Regression Risk]
Currently, since all IPv4 access lists are busted, the only potential regression that comes to mind is if the new code has a bug in parsing certain CIDRs that leads to a crash.

[Launchpad Janitor (janitor)]

This bug was fixed in the package conserver - 8.2.4-2ubuntu1

---------------
conserver (8.2.4-2ubuntu1) groovy; urgency=medium

  * Fix IPv4 CIDR-based access lists. LP: #1900747

 -- dann frazier <email address hidden> Tue, 20 Oct 2020 11:48:00 -0600

[Brian Murray (brian-murray)]

Hello dann, or anyone else affected,

Accepted conserver into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/conserver/8.2.4-2ubuntu0.20.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[dann frazier (dannf)]

I upgraded to the version in -proposed and verified that my IPv4 allow config works.

[Launchpad Janitor (janitor)]

This bug was fixed in the package conserver - 8.2.4-2ubuntu0.20.04.1

---------------
conserver (8.2.4-2ubuntu0.20.04.1) focal; urgency=medium

  * Fix IPv4 CIDR-based access lists. LP: #1900747

 -- dann frazier <email address hidden> Tue, 20 Oct 2020 12:19:19 -0600

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for conserver has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.