[Openembedded-architecture] OE-Core/Yocto Project's first CVE (CVE-2017-9731)

[Philip Balister]

On 06/19/2017 06:38 AM, Richard Purdie wrote:
> I suspect this has been missed by some people so I want to spell it
> out. We have our first CVE in OE-Core itself.
> 
> The issue is limited to binary ipks potentially exposing sensitive
> information through the "Source:" field which contained the full
> SRC_URI. Those urls could potentially contain sensitive information
> about servers and credentials.

So the issue is leaking credentials, not build system paths? I mention
this because we do leak build system paths into images in other places.

Philip


> 
> After discussion, I ended up changing the field to contain the recipe
> filename (no path). There was talk of filtering the urls however if you
> try, it becomes clear that sensitive elements can remain and no
> solution is likely 100% effective. The other package backends don't do
> this at all so this brings ipk more into line with them. Simply
> clearing the field doesn't work with the current opkg-utils. It can be
> changed but the change becomes more invasive.
> 
> This fix has been merged to master.
> 
> I also did take the decision to backport this change back to
> pyro/morty/krogoth too. I appreciate this can cause some disruption to
> people who rely on SRC_URI being in the Source: field however I
> couldn't see any other realistic way forward.
> 
> Cheers,
> 
> Richard
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