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Thursday, December 24, 2015

How to fix Grub2 bootloader flaw.

According to researchers Ismael Ripoll and Hector Marco,who wrote this article:

A vulnerability in Grub2 has been found. Versions from 1.98 (December, 2009) to 2.02 (December, 2015) are affected. The vulnerability can be exploited under certain circumstances, allowing local attackers to bypass any kind of authentication (plain or hashed passwords). And so, the attacker may take control of the computer.

Just hit the backspace key 28 times at the Grub username prompt during power-up.
This will open a Grub rescue shell with the rescue shell allows unauthenticated access to a computer and the ability to load another environment.
The Grub versions 1.98 to 2.02 are affected and suffer integer overflow problem.
The basic of the fault lies within two functions; the grub_password_get() function and the and grub_password_get() script.
To fix it use this patch.

Sunday, November 22, 2015

Ghostscript tutorial ...

Today I wrote a simple tutorial about Ghostscript under Windows 10.
Most parts of this tutorial can be used also with Linux - example only.
Also the part of stack working on Linux like Windows.
I will come also with one tutorial about Ghostscript and Linux only.
The tutorial can be found here.

Thursday, November 19, 2015

News: Nvidia VR with SDK.

November 18, 2015: NVIDIA released the GameWorks VR and DesignWorks VR Software Development Kits.
The 1.0 SDK releases also add support for Windows 10.
The main reason is a complex challenge VR versus graphics processing to traditional 3D apps and games.

You can read more about this here and can also see this video:

Wednesday, November 18, 2015

Fedora 23 - error with win qemu and virtualbox.

First I try to use WinQemu from here : qemu-w64-setup-20151115.exe 2015-11-15 11:15 22M QEMU Installer for Windows (64 bit).
I use this commands for qemu:
C:\qemu>qemu-img create -f qcow2 fedora23_disk.img 8G 
C:\qemu>qemu-system-x86_64w.exe -hda fedora23_disk.img -cdrom Fedora-Live-Workstation-x86_64-23-10.iso -boot d
The output error come with this image:
 
I try also with VirtualBox - using same size 8Gb of disk image but seam come with errors.
 I use Intel CPU 2117U @ 1.80Ghz / 4Gb Ram and Nvidia Geforce GT 740M video card, but seam this not help me.
Why Fedora team ? Why ?

Sunday, October 18, 2015

MultCloud - free provide 10TB.

MultCloud(https://www.multcloud.com/), a FREE and easy-to-use web app, supports for Managing Files and Transferring Files across Cloud Drives. Free provide 10TB traffic for data transmission.

Wednesday, September 30, 2015

News: Google Play Store increasing file size .

To help developers build apps , Google Play Store increasing file size limit from 50 MB to 100 MB.
Seam Google wants to encourage developers to create richer apps and games.
Also, users will see a warning only when the app exceeds the 100MB quota and makes use of Expansion Files.
You can read more at support googleplay apk