Privilege Escalation in AMD ATI Driver for Windows
CVE-2020-12138

8.8HIGH

Key Information:

Vendor

Amd
Status
Atillk64
Vendor
CVE Published:
27 April 2020

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-12138?

The AMD ATI atillk64.sys driver version 5.11.9.0 contains a vulnerability that allows low-privileged users to access physical memory directly. By exploiting certain driver routines, these users can map physical memory into their process's virtual address space, enabling them to elevate their privileges to NT AUTHORITY\SYSTEM level. This is achieved through specific DeviceIoControl calls such as MmMapIoSpace, IoAllocateMdl, MmBuildMdlForNonPagedPool, or MmMapLockedPages, posing a significant security risk.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-12138 - Proof of Concept

References

https://eclypsium.com/2019/11/12/mother-of-all-drivers/
x_refsource_MISC
https://h0mbre.github.io/atillk64_exploit/
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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