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Date: Tue, 16 Sep 2014 07:17:20 +0200
From: Marcus Meissner <>
Subject: Re: CVE-Request: squid pinger remote DoS

On Tue, Sep 09, 2014 at 10:53:51AM +0200, Sebastian Krahmer wrote:
> Hi
> I made a fix for squid 3.4.6 and request a CVE for
> this issue:
> The pinger code that checks for nodes being alive doesnt
> properly validate ICMP and ICMPv6 replies, in particular
> icmp6 types which are used to index into a string array.
> This could cause crashes when the index is OOB.
> A patch is available here:
> I also made some cleanups and error checking on the
> receive socket.
> I am not deep into the overall squid architecture so
> I dont know what happens to squid itself when the
> pinger sub-process crashes (think SIGPIPE etc). But to me
> it looks like you can only DoS the pinger sub-system,
> not the whole squid.


Ciao, Marcus

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