oss-security - Re: CVE Request: zeromq downgrade attack

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Date: Mon, 11 May 2015 07:13:20 +0200
From: Salvatore Bonaccorso <carnil@...ian.org>
To: oss-security@...ts.openwall.com
Cc: zeromq-dev@...ts.zeromq.org,
	CVE Assignments MITRE <cve-assign@...re.org>
Subject: Re: CVE Request: zeromq downgrade attack

Hi,

On Thu, May 07, 2015 at 04:49:08PM +0200, Alessandro Ghedini wrote:
> [ CCing upstream mailing list ]
> 
> Hello,
> 
> From https://github.com/zeromq/libzmq/issues/1273 :
> 
> > It is easy to bypass the security mechanism in 4.1.0 and 4.0.5 by sending a
> > ZMTP v2 or earlier header. The library accepts such connections without
> > applying its security mechanism.
> > 
> > Solution: if security is defined on a socket, reject all V2 and earlier
> > connections, unconditionally.
> 
> A patch for the zeromq 4.0.x stable series is available at
> https://github.com/zeromq/zeromq4-x/commit/b6e3e0f601e2c1ec1f3aac880ed6a3fe63043e51
> 
> AFAICT no CVE has been assigned (or requested) for this, and the issue has
> been public since December of last year.
> 
> Could a CVE be assigned please?

For reference, an update for this issue has been released yesterday in
Debian as
https://lists.debian.org/debian-security-announce/2015/msg00144.html

Regards,
Salvatore

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