Re: [vbox-dev] How to populate a Linux VM with the items requested by a dmidecode -t 17

[Rodney Lott]

Thanks, Mihal.

That worked perfectly! To answer your first question, the guest is used to test 
various software, including an installation ISO. Part of the installer uses 
dmidecode -t17 to detect the amount of RAM and indicate to the user if they 
have enough memory to complete the install. This works fine with real hardware, 
but the VM didn't report any of that, hence my problem.

Best regards,

Rodney

On 2018-11-09 06:34 PM, Mihai Hanor wrote:
Hi,

Why is it necessary for the guest?

Run this command and see if it does what you want:
VBoxManage setextradata "VM name" 
VBoxInternal/Devices/pcbios/0/Config/DmiExposeMemoryTable 1
Source: 
www.virtualbox.org/ticket/12017?cversion=0_hist=1#comment:5



Regards,
Mihai

On Fri, 9 Nov 2018 at 22:29, Rodney Lott 
mailto:rl...@evertz.com>> wrote:
Hi, there.

First, my details:

Host machine:
rlott@rlott-brix:~$ uname -a; lsb_release -a
Linux rlott-brix 4.13.0-46-generic #51-Ubuntu SMP Tue Jun 12 12:36:29 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux
No LSB modules are available.
Distributor ID:Ubuntu
Description:Ubuntu 17.10
Release:17.10
Codename:artful
VirtualBox version: 5.2.6 r120293 (Qt5.9.1)
Guest VM: Custom Ubuntu version
root@magtestvm:/udata/home/etdev# uname -a; lsb_release
Linux magtestvm 4.4.0-116-generic #140~14.04.1-Ubuntu SMP Fri Feb 16 09:25:20 
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

I was wondering if there was a way to populate the DMI information to simulate 
memory banks for a Linux-based VM. If I do a dmidecode -t17 on my guest, I see 
the following:

root@magtestvm:/udata/home/etdev# dmidecode -t17
# dmidecode 2.12
SMBIOS 2.5 present.

Upon further examination, I saw in the full dmidecode output that no such 
memory bank sections existed.

I found this section in the manual about setting DMI information: 
https://www.virtualbox.org/manual/ch08.html#idm5744

I saw in this piece of the source code that it does support DMI Memory (type 
17): 
https://www.virtualbox.org/svn/vbox/trunk/src/VBox/Devices/PC/DevFwCommon.cpp

So, is there such a call to set various things like this?

VBoxManage setextradata  
VBoxInternal/Devices/pcbios/0/Config/DmiMemory/ 

If so, would you point me to where a list of values for  would be?

Thanks very much!

Rodney


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Re: [vbox-dev] "Disgruntled Security Researcher Publishes Major VirtualBox 0-Day Exploit"

[Michael Thayer]

Hello Larry,

It looks to me like the site was updated after 5.2.22 was released to
say that the researcher considers the issue fixed.  Unfortunately we are
by Oracle policy to comment on security fixes or even mention them in
the change log - all security information is published in the quarterly
Oracle critical patch update information.  Please note though that we
take security seriously!

Regards
Michael

11.11.18 22:13, Larry Finger wrote:
> On 11/11/18 1:09 AM, Mihai Hanor wrote:
>> Hi,
>>
>> According to the same researcher, Virtualbox 5.2.22 fixes the
>> vulnerability:
>>
>> https://github.com/MorteNoir1/virtualbox_e1000_0day/issues/12
> 
> I'm not sure that he says that 5.2.22 fixes the problem. What he says is
> that 5.2.20 and earlier are affected; however, 5.2.22 was released after
> his posting.
> 
> Larry
> 
> 
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