Bad interface name

[les]

[Impact]

ufw's interface name's or both too strict (this bug) and too loose (iptables has its own limits). Adjust the interface name checks to match those of the kernel.

[Test Case]

$ sudo ufw --dry-run allow in on i-1|grep i-1
### tuple ### allow any any 0.0.0.0/0 any 0.0.0.0/0 in_i-1
-A ufw-user-input -i i-1 -j ACCEPT
### tuple ### allow any any ::/0 any ::/0 in_i-1
-A ufw6-user-input -i i-1 -j ACCEPT

With an unpatched ufw, the above results in:

$ sudo ufw --dry-run allow in on i-1|grep i-1
ERROR: Bad interface name

[Regression Potential]

Risk of regression is considered low since the updated allow more than what is currently allowed, but not more than what iptables allows. See:

https://git.launchpad.net/ufw/tree/src/common.py?h=release/0.36#n295

= Original description =

Is there a reason to restrict interface's name in ufw?
Should ufw accept what iptables accept as iface name?

I've a vpn with lot of nodes, its iface name contain a '-' so cannot use ufw on it.

I've found the check here and cannot found a reason for it:
http://bazaar.launchpad.net/~jdstrand/ufw/trunk/view/head:/src/common.py#L300

thanks

[Jamie Strandboge (jdstrand)]

Thank you for using Ubuntu and reporting a bug. We restrict the interface name simply for input validation and after doing a bit of research, I see no reason why we can't allow '-' and '_' in the interface name. I'll adjust trunk for that, but it may be expanded further.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ufw - 0.36-1

---------------
ufw (0.36-1) unstable; urgency=medium

  * New upstream release (LP: #1782384, LP: #1664133, LP: #1509725,
    LP: #1695718, LP: #1719211, LP: #1775043, LP: #1204579, LP: #1652163,
    LP: #1377600, Closes: 686248, LP: #1368411, LP: #1586258, Closes: 909163,
    Closes: 884932, LP: #1558068)
    - drop 0002-bug849628.patch (included upstream)
    - drop 0003-use-default-tcp-syncookies.patch (included upstream)
    - drop 0004-lp1633698.patch (included upstream)
  * Remaining changes:
    - 0001-optimize-boot.patch
  * debian/ufw.maintscript: remove /etc/bash_completion.d/ufw on upgrade
    (LP: #1602834)
  * debian/control: remove no longer needed xs-python-version and
    x-python3-version fields
  * update debian/before6.rules.md5sum for file shipped in 0.35-6. While both
    before.rules and before6.rules were updated in this new upstream release,
    0.35-6 mistakenly already had its own md5sum for before.rules, so we don't
    need to add it now.

 -- Jamie Strandboge <email address hidden> Fri, 14 Dec 2018 17:50:47 +0000

[Łukasz Zemczak (sil2100)]

An upload of ufw to cosmic-proposed has been rejected from the upload queue for the following reason: "All bugs mentioned in the .changes file (so therefore also in the new debian/changelog entries) need to comply with SRU standards (test-case, regression potential). Please re-upload after filling out the required info or modify changelog to exclude irrelevant bug numbers.".

[Brian Murray (brian-murray)]

Hello les, or anyone else affected,

Accepted ufw into cosmic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ufw/0.36-0ubuntu0.18.10.1 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 and change the tag from verification-needed-cosmic to verification-done-cosmic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-cosmic. 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.

[Brian Murray (brian-murray)]

Hello les, or anyone else affected,

Accepted ufw into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ufw/0.36-0ubuntu0.18.04.1 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 and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. 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.

[Jamie Strandboge (jdstrand)]

Tested this is fixed in cosmic:

$ apt-cache policy ufw
ufw:
  Installed: 0.36-0ubuntu0.18.10.1
  Candidate: 0.36-0ubuntu0.18.10.1
  Version table:
 *** 0.36-0ubuntu0.18.10.1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic-proposed/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu cosmic-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     0.35-6 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu cosmic/main i386 Packages

[Jamie Strandboge (jdstrand)]

Verified this is fixed in bionic:

$ apt-cache policy ufw
ufw:
  Installed: 0.36-0ubuntu0.18.04.1
  Candidate: 0.36-0ubuntu0.18.04.1
  Version table:
 *** 0.36-0ubuntu0.18.04.1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu bionic-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     0.35-5 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu bionic/main i386 Packages

[Launchpad Janitor (janitor)]

This bug was fixed in the package ufw - 0.36-0ubuntu0.18.10.1

---------------
ufw (0.36-0ubuntu0.18.10.1) cosmic-proposed; urgency=medium

  * Backport to cosmic addressing the following SRU bugs:
    - LP: #1811129 - master SRU bug
    - LP: #1664133 - before6.rules: echo-reply needs to be before INVALID
    - LP: #1719211 - improve interface name checks
    - LP: #1775043 - shell-completion/bash: adjust for modern bash
    - LP: #1204579 - support concurrent updates
    - LP: #1368411 - add 'prepend' command

 -- Jamie Strandboge <email address hidden> Mon, 25 Mar 2019 20:46:10 +0000

[Robie Basak (racb)]

The verification of the Stable Release Update for ufw has completed successfully and the package has now been 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.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ufw - 0.36-0ubuntu0.18.04.1

---------------
ufw (0.36-0ubuntu0.18.04.1) bionic-proposed; urgency=medium

  * Backport to bionic addressing the following SRU bugs:
    - LP: #1811129 - master SRU bug
    - LP: #1664133 - before6.rules: echo-reply needs to be before INVALID
    - LP: #1719211 - improve interface name checks
    - LP: #1775043 - shell-completion/bash: adjust for modern bash
    - LP: #1204579 - support concurrent updates
    - LP: #1368411 - add 'prepend' command

 -- Jamie Strandboge <email address hidden> Mon, 25 Mar 2019 21:14:25 +0000