Re: [PATCH v2 0/2] QGA installer fixes

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 21/2/23 12:21, Konstantin Kostiuk wrote:
> resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2167423
> fixes: CVE-2023-0664
> 
> CVE Technical details: The cached installer for QEMU Guest Agent in c:\windows\installer
> (https://github.com/qemu/qemu/blob/master/qga/installer/qemu-ga.wxs),
> can be leveraged to begin a repair of the installation without validation
> that the repair is being performed by an administrative user. The MSI repair
> custom action "RegisterCom" and "UnregisterCom" is not set for impersonation
> which allows for the actions to occur as the SYSTEM account
> (LINE 137 AND 145 of qemu-ga.wxs). The custom action also leverages cmd.exe
> to run qemu-ga.exe in line 134 and 142 which causes an interactive command
> shell to spawn even though the MSI is set to be non-interactive on line 53.
> 
> v1: https://lists.nongnu.org/archive/html/qemu-devel/2023-02/msg05661.html

Per 
https://lore.kernel.org/qemu-devel/CAA8xKjUQFBVgDVJ059FvGoSjkv+kZ5jB1gfMNz+ao-twH7FDRg@mail.gmail.com/:

Reported-by: Brian Wiltse <brian.wiltse@live.com>

> v1 -> v2:
>    Add explanation into commit messages

Thanks, much appreciated!

> Konstantin Kostiuk (2):
>    qga/win32: Remove change action from MSI installer
>    qga/win32: Use rundll for VSS installation
> 
>   qga/installer/qemu-ga.wxs | 11 ++++++-----
>   qga/vss-win32/install.cpp |  9 +++++++++
>   qga/vss-win32/qga-vss.def |  2 ++
>   3 files changed, 17 insertions(+), 5 deletions(-)
> 
> --
> 2.25.1
>