ergot86 / hyperv_stuff

Hyper-V related resources

Hyper-V stuff

This repository contains some of the Hyper-V related work I did in the past...

GHHv6_ch25

My code from the "Inside Hyper-V" of the Gray Hat Hacking book (6th edition).

Original repository: https://github.com/GrayHatHacking/GHHv6.git

Includes a framework that can be used to perform hypervisor research/fuzzing and hyper-v specific code (hypercalls, MSRs, VMBus communication).

windbg_hyperv_script.js

Windbg script that can be used when debugging hvix64 and provides the following features:

• Dumping VMCS contents.
• Dumping EPT tables.
• GPA -> SPA translation.
• Conditional breakpoints on VMExit conditions:
  • Use !brexit conditions.
  • Where conditions is a in the form condition1 condition2 .. conditionN.
  • Each condition consists of 3 parts (in the described order and without space between them):
    1. A VMCS field name (for example VM_EXIT_REASON)
    2. A condition code: any of ==, !=, <=, >=, <, >.
    3. An integer value.

CVE-2020-0751.c

Proof of concept for Hyper-V stack overflow bug (hvix64).

Advisory: https://labs.bluefrostsecurity.de/advisories/bfs-sa-2020-001/

CVE-2020-0890.c

Proof of concept for Hyper-V NULL deref bug (hvix64).

Advisory: https://labs.bluefrostsecurity.de/advisories/bfs-sa-2020-002/

CVE-2020-0904.c

Proof of concept for Hyper-V type confusion bug (hvix64).

Advisory: https://labs.bluefrostsecurity.de/advisories/bfs-sa-2020-003/

CVE-2021-28476

Proof of concept for Hyper-V arbitrary memory read bug (vmswitch).

Advisory: https://labs.bluefrostsecurity.de/advisories/bfs-sa-2021-001/

Original repository: https://github.com/bluefrostsecurity/CVE-2021-28476

Notes:

• This bug was classified as RCE, learn why here.
• This bug has also been presented by other researchers: https://www.youtube.com/watch?v=ALcm6pmR8ck
• In the advisory I included other OOB read bugs I found but no CVEs were assigned to them.