[Bug 855] New: Can create user chains with names unparsable by iptables-restore

[bugzilla-daemon at netfilter.org]

https://bugzilla.netfilter.org/show_bug.cgi?id=855

           Summary: Can create user chains with names unparsable by
                    iptables-restore
           Product: iptables
           Version: 1.4.x
          Platform: All
        OS/Version: Debian GNU/Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: iptables
        AssignedTo: netfilter-buglog at lists.netfilter.org
        ReportedBy: andrew at domaszek.com
   Estimated Hours: 0.0


iptables allows the creation of user defined chains with whitespace or
unprintable characters which cannot be properly parsed by iptables-restore.

Steps to reproduce:

root at hephaestus:~# iptables -N $'bad\nchain.'
root at hephaestus:~# iptables-save
# Generated by iptables-save v1.4.14 on Wed Oct  2 21:57:39 2013
*filter
:INPUT ACCEPT [29:2180]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [15:1516]
:bad
chain. - [0:0]
COMMIT
# Completed on Wed Oct  2 21:57:39 2013
root at hephaestus:~# iptables-save > rulelist
root at hephaestus:~# iptables-restore < rulelist
iptables-restore v1.4.14: iptables-restore: line 6 policy invalid

Error occurred at line: 6
Try `iptables-restore -h' or 'iptables-restore --help' for more information.

Also tested with gentoo iptables v1.4.16.3, with the same result.

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