Unfortunately, details on these unknown opcodes were not available but hopefully we’ll see someone continue his research online.Ĥ. Using this trick he discovered a multitude of undocumented instructions and at least one hardware security bug. The trick to find these instructions involves a subtle edge case in the x86 specification, creating a difference between unknown and incorrect instructions. Domas gave a great lecture on undocumented instructions in x86 CPUs. Because many of the Wi-Fi bugs such as the ones disclosed by Nitay and Gal Beniamini (of Google Project Zero) don’t require authentication, they can easily be turned into mobile phone worms. Nitay’s lecture on bugs in the Broadcom Wifi chipset picked up a lot of buzz. Both Christopher Domas and Nitay Artenstein presented high quality embedded research, undocumented CPU features and bugs in Wi-Fi firmware.Ģ. He concluded by explaining how Microsoft methodically closed these vulnerabilities and released the tool used for that purpose.Įmbedded research is back.
#Defcon code
In the next nine minutes, Lee covered a series of code injection vulnerabilities that enable attackers to bypass these protections.
Amazingly, he covered that in 10 minutes. In this situation, compromised credentials don’t matter, since they are heavily limited and automatically disabled in a short timeframe. Using a combination of Roles and Virtual Accounts, administrators can utilize one time locked down credentials per task.
#Defcon windows
“ Attacking Battle Hardened Windows Servers ” At DEFCON, Lee Holmes, security architect at Microsoft reviewed the Just Enough Administration feature in PowerShell. I thought of sharing with you some of my favorites:ġ. As usual, some were good, some had an interesting subject but were more appropriate for a blog post and some were just great. Ofri Ziv, Head of Guardicore labs, presented a backdoor we discovered in VMware’s remote administration API, enabling vSphere users to quickly and easily take over guest machines without providing guest credentials Besides meeting people and enjoying the dual craziness of the DEFCON crowd and the Black Hat business hall, we also gave a well received lecture – Escalating Insider Threats using VMWare’s API. disclaims proprietary interest in the marks and names of others.I spent the last week at the “Hacker Summer Camp” of Black Hat and DEFCON. Other trademarks and trade names may be used in this document to refer to either the entities claiming marks and names or their products. While all efforts are made to check pricing and other errors, inadvertent errors do occur from time to time and Dell reserves the right to decline orders arising from such errors.
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#Defcon upgrade
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