Re: [B.A.T.M.A.N.] [PATCH maint 2/2] batman-adv: Fix multicast TT issues with bogus ROAM flags

Sven Eckelmann
2018-06-12T19:47:41Z

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On Donnerstag, 7. Juni 2018 00:46:24 CEST Linus Lüssing wrote:
> When a (broken) node wrongly sends multicast TT entries with a ROAM
> flag then this causes any receiving node to drop all entries for the
> same multicast MAC address announced by other nodes, leading to
> packet loss.
>
> Fix this DoS vector by only storing TT sync flags. For multicast TT
> non-sync'ing flag bits like ROAM are unused so far anyway.
>
> Fixes: 405cc1e5a81e ("batman-adv: Modified forwarding behaviour for multicast packets")
> Reported-by: Leonardo Mörlein <me@irrelefant.net>
> Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

Added as c7054ffae0c3 [1]

Thanks,
Sven

[1] https://git.open-mesh.org/batman-adv.git/commit/c7054ffae0c3b08bb4bef3cffee1e0a543e14096

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