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On 2018-05-08 20:32, john wrote:
> On 05/08/18 15:19, Andrew David Wong wrote:
> 
>>            Xen vulnerability (XSA-260) and GUI daemon issue
>>
>> Summary
>> ========
>>
>> Today, the Xen Security Team released Xen Security Advisories 260
>> through 262. Among these, only XSA-260 affects the security of Qubes
>> OS. The bug described in XSA-260 allows an attacker controlling a PV
>> domain to break out to dom0. This is a critical bug for Qubes 3.2, but
>> for Qubes 4.0 is much less severe, since all the domains that run
>> untrusted code in Qubes 4.0 are either PVH or HVM by default.
>>
>> Additionally, Christoffer Kugg Jerkeby discovered a situation in which
>> Qubes GUI virtualization could allow a VM to produce a window with
>> borders that are white instead of the color of the VM's label. 
> 
> RE: ***
> (InQubes, border colors are used as front-line indicators of trust.)
>> However, a VM cannot use this vulnerability to draw borders with a
>> non-white color other than the correct one. A very similar bug was
>> fixed as part of QSB #34 [1], but the fix missed this one case, as
>> described below.
> 
> I find this interesting as I've noticed that though some of my AppVMs
> color choice  is grey  ,  when I see them on the XFCE  Taskbar  they are
>  Green ......
> 
> Is this some known issue  in  GitHub  ....
> 

This appears to be it:

https://github.com/QubesOS/qubes-issues/issues/3471

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org

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