Intel Ping Of Death!!

Do you remember the old Ping Of Death attack?? How cool was it ?! At that time breaking the stack was as simple as breaking the modelling assumptions, for example breaking the stack in 1997 was as simple as sending to the target stack a unexpected length in the ICMP packet ! The time being where a malformed source and destination address caused the smurf attack. After those implementation mistakes, developers, engineers and the developing frameworks became more and more sophisticated, became more and more complete in term of security checking. It is a long time since I saw another mistake like this ! ... Until today ! Today I've read a post talking about another implementation bug in the TCP/IP stack made by Intel engineers. The writer shows how the Intel card ( 82574L ) shouts down if a specific value (0x32) is placed into a specific address ( 0x47F). Which basically means if the ASCII "2" is into a specific address in the sent stream. Let's take a closer look to the byte stream:

Shutting down an ethernet card could be pretty annoying for a system, in fact you need to reboot your entire machine before getting the card working back again. Further analysis showed that different values placed into the same address, change the card behavior. So hard to find so easy to test.
"ping -p 32 -s 65550 192.168.56.100"

Comments

Hacking Windows 10 UWP App: DLL Injection & common Vulnerabilities

I recently started working on widows 10 Apps( Apps not Applications) security. Before diving deep in hacking terms lets try to understand what's new in Windows 10 UWP( Universal Platform) as compared to old Apps. Lets begin with how apps actually work on windows 10(desktop/tablet). Now windows 10 comes with a container only for running apps inside the isolated environment. By default, /APPCONTAINER(Linker Flag) is off. This option modifies an executable to indicate whether the app must be run in the appcontainer process-isolation environment. Specify /APPCONTAINER for an app that must run in the appcontainer environment—for example, a Windows Store app. (The option is set automatically in Visual Studio when you create a Windows Store app from a template.) For a desktop app, specify /APPCONTAINER:NO or just omit the option. The /APPCONTAINER option was introduced in Windows 8. Now there is no registry entry concept for these app in the System HIVE rather they install they own hiv...

Installing vmware-11.0 on Ubuntu 15.04 Using kernel Patch

curl http://pastie.org/pastes/9934018/download -o /tmp/vmnet-3.19.patch cd /usr/lib/vmware/modules/source tar -xf vmnet.tar patch -p0 -i /tmp/vmnet-3.19.patch tar -cf vmnet.tar vmnet-only rm -r *-only vmware-modconfig --console --install-all References: http://askubuntu.com/questions/605530/vmware-player-7-1-0-on-ubuntu-15-04-kernel-3-19-0-10-generic-app-loading http://askubuntu.com/questions/617704/failed-to-build-vmnet-for-kernel-3-19

SSI Injection Attack

SSIs are directives present on Web applications used to feed an HTML page with dynamic contents. They are similar to CGIs, except that SSIs are used to execute some actions before the current page is loaded or while the page is being visualized. In order to do so, the web server analyzes SSI before supplying the page to the user. The Server-Side Includes attack allows the exploitation of a web application by injecting scripts in HTML pages or executing arbitrary codes remotely. It can be exploited through manipulation of SSI in use in the application or force its use through user input fields. It is possible to check if the application is properly validating input fields data by inserting characters that are used in SSI directives, like: Code: < ! # = / . " - > and [a-zA-Z0-9] Another way to discover if the application is vulnerable is to verify the presence of pages with extension .stm, .shtm and .shtml. However, the lack of these type of pages does not mean that th...

aLt's Security Blog

Search This Blog