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Re: [Qemu-block] [Qemu-devel] [PATCH] nbd: Fix regression on resiliency
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH] nbd: Fix regression on resiliency to port scan |
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Date: |
Fri, 9 Jun 2017 06:17:59 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0 |
On 06/08/2017 05:26 PM, Eric Blake wrote:
> Back in qemu 2.5, qemu-nbd was immune to port probes (a transient
> server would not quit, regardless of how many probe connections
> came and went, until a connection actually negotiated). But we
> broke that in commit ee7d7aa
> Simple test across two terminals:
> $ qemu-nbd -f raw -p 30001 file
> $ nmap 127.0.0.1 -p 30001 && \
> qemu-io -c 'r 0 512' -f raw nbd://localhost:30001
This is now being assigned a CVE.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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