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Juan Sacco’s Post
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Juan Sacco
Exploit Writer, Reverse Engineer, OSCP, OSCE, Advanced Corelan, IDA Pro Advanced training. Start-up owner of Exploit Pack: exploitpack.com
8h
One more Windows Kernel 0-day! 🥳 This time for a driver using WRMSR.
The CPU has special registers called Model Specific Registers (MSRs) that control low-level system behavior. Normally, only the Windows kernel can change them using a CPU instruction called WRMSR.
A WRMSR exploit happens when a vulnerable driver or virtualization layer mistakenly allows normal programs to write to these registers. If attackers get that access, they can tamper with how the CPU enforces protections, crash the system, or even escalate privileges to SYSTEM for example, by swapping security tokens and impersonating higher-privileged processes, like shown here.
TL;DR: WRMSR it’s a flaw where a driver opens the door to hardware instructions that should never be reachable from user space and attackers can use it to take over Windows machines.
Affected driver: https://lnkd.in/e9pGwD5k
Get this and more exploits from https://exploitpack.com
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6 Comments
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Peyton Hawk, graphic
Peyton Hawk
Self-taught systems programmer | Reverse engineer | Security researcher
4h
Nice
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Mahmoud NourEldin, graphic
Mahmoud NourEldin
Reverse Engineer & Malware Analyst, Interesting in Windows Kernel Exploitation
6h
Impressive 🥰
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Valton Tahiri, graphic
Valton Tahiri
Cyber Security Engineer | Cybee.ai
7h
Nice one!
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Elad Eyni, graphic
Elad Eyni
Co-Founder & Cyber Security Engineer & Research at Cypros LTD
3h
You already administrator no?
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1 Reaction
Vladimir Tokarev, graphic
Vladimir Tokarev
Senior Vulnerability Researcher | Speaker @ BlackHat USA (2023, 2024) / Defcon Recon Village / RSA / Firecon | Cyber Security Researcher | Cloud Researcher | OS Internals Researcher | 11+ years of experience 🧙♂️
2h
Cool stuff bro ! 😎
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Juan Sacco
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🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Juan Sacco – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
