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Date: Fri, 15 Jan 2016 16:58:07 +0100
From: "Jason A. Donenfeld" <>
To: oss-security <>, 
	Qualys Security Advisory <>
Subject: Re: Qualys Security Advisory - Roaming through the
 OpenSSH client: CVE-2016-0777 and CVE-2016-0778

On Fri, Jan 15, 2016 at 4:56 PM, Jason A. Donenfeld <> wrote:
> Great work Qualys. One question about the PoC:
> On Thu, Jan 14, 2016 at 6:13 PM, Qualys Security Advisory
> <> wrote:
>> # env ROAMING="heap_massaging:linux" "`pwd`"/sshd -o ListenAddress= -o
>> UsePrivilegeSeparation=no -f /etc/ssh/sshd_config -h /etc/ssh/ssh_host_rsa_key
> Does your proof of concept patch actually include support for this
> heap_massaging mode?

Read more carefully, answered my own question:

> - Massage the client's heap before roaming_reply() malloc()ates out_buf,
>   and force malloc() to return a previously free()d but uncleansed chunk
>   of sensitive information. The simple proof-of-concept in this advisory
>   does not implement heap massaging.

That's a shame. Please reconsider.

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