Fixed in cauldron (awaiting freeze push exemption). I've updated to latest version in mga3 & mga4, since the patch doesn't apply cleanly due to the old version (web frameworks are a rapid moving target).

Submitted packages in core/updates_testing :
- perl-Plack-1.3.100-1.mga3
- perl-Plack-1.3.100-1.mga4

==> this fails, since they require more recent versions of other perl modules (Apache::LogFormat::Compiler, File::ShareDir::Install)...

What do you recommend? Update those deps also, struggle to try to apply the patch (but I won't have the time to do it quickly), other?

CC: (none) => jquelin
Assignee: jquelin => qa-bugs

If you're asking QA whether we'd prefer you to create more work for us or for yourself, then the answer is likely going to be the latter ;)

Actually it is policy though to patch where practical Jerome, this being one of the reasons behind the policy.

https://wiki.mageia.org/en/Updates_policy

I'm adding the feedback marker for now until there is something here for us to test.

Version: Cauldron => 4
Whiteboard: MGA4TOO, MGA3TOO => MGA3TOO feedback

Jerome, if updating the perl modules wouldn't hurt anything (as is usually the case), that would be fine.  Ultimately, whichever solution is easier for you is best.

I have uploaded a patched packages for Mageia 3 and 4.

I'm not sure how to test it as there is no know POC. What I did is that I first patched in the added test and checked that the build failed. I then patched also the fix and now the build was successful.

Suggested advisory:
========================

Updated perl-Plack package fixes the following security issue:

- Plack::App::File would previously strip trailing slashes off
provided paths. This in combination with the common pattern
of serving files with Plack::Middleware::Static could allow
an attacker to bypass a whitelist of generated files (avar) #446

Upstream fix:
https://github.com/avar/Plack/commit/bc1731dbb53850c380875ad683cd87c8ec99eee3

References:
https://github.com/plack/Plack/issues/405
http://seclists.org/oss-sec/2014/q3/345
========================

Updated packages in core/updates_testing:
========================
perl-Plack-1.1.400-2.1.mga3.noarch
perl-Plack-1.2.900-2.1.mga4.noarch

Source RPMs: 
perl-Plack-1.1.400-2.1.mga3.src.rpm
perl-Plack-1.2.900-2.1.mga4.src.rpm

Hardware: i586 => All
Assignee: jquelin => qa-bugs

Thanks for the details Sander!  Given what you said about the testcase, the QA team shouldn't have to do more than test installing it.

I would write the advisory as follows.

Plack::App::File would previously strip trailing slashes off provided paths.
This in combination with the common pattern of serving files with
Plack::Middleware::Static could allow an attacker to bypass a whitelist of
generated files (CVE-2014-5269).

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5269
https://lists.fedoraproject.org/pipermail/package-announce/2014-August/137115.html

Testing on Mageia4-64 real HW

With current package :
--------------------

perl-Plack-1.2.900-2.mga4.noarch

Tested with simple perl plack script found on the web :

#!/usr/bin/perl
    use strict;
    use warnings;
     
    my $app = sub {
    return [
    '200',
    [ 'Content-Type' => 'text/html' ],
    [ scalar localtime ],
    ];
    };

Saved as testplack.psgi

In terminal, 
$ plackup testplack.psgi
in browser, went to : http://localhost:5000/ 

Page displayed current time which I could update by reloading the page.
Ctrl-C in terminal to stop.

Update to testing package :
-------------------------
perl-Plack-1.2.900-2.1.mga4.noarch

Installation OK, could run same script.

All OK

CC: (none) => olchal
Whiteboard: MGA3TOO => MGA3TOO MGA4-64-OK

Well done Olivier

Testing complete mga3 32 using this procedure.

Whiteboard: MGA3TOO MGA4-64-OK => MGA3TOO has_procedure mga3-32-ok MGA4-64-OK

Tested on Mageia3-64 real hardware

Current package :
- perl-Plack-1.1.400-2.mga3.noarch
Update testing package :
- perl-Plack-1.1.400-2.1.mga3.noarch

All OK

Whiteboard: MGA3TOO has_procedure mga3-32-ok MGA4-64-OK => MGA3TOO has_procedure mga3-32-ok MGA3-64-OK MGA4-64-OK

Validating, advisory uploaded.

Keywords: (none) => validated_update
Whiteboard: MGA3TOO has_procedure mga3-32-ok MGA3-64-OK MGA4-64-OK => MGA3TOO has_procedure mga3-32-ok MGA3-64-OK MGA4-64-OK advisory
CC: (none) => remi, sysadmin-bugs

An update for this issue has been pushed to Mageia Updates repository.

http://advisories.mageia.org/MGASA-2014-0486.html

Status: NEW => RESOLVED
Resolution: (none) => FIXED