Summary
The current cryptography implementation in Sliver up to version 1.5.39 allows a MitM with access to the corresponding implant binary to execute arbitrary codes on implanted devices via intercepted and crafted responses. (Reserved CVE ID: CVE-2023-34758)
Details
Please see the PoC repo.
PoC
Please also see the PoC repo.
To setup a simple PoC environment,
- Generate an implant with its C2 set to the PoC server's address and copy the embedded private implant key and public server key into the config json.
- Run the implant on a separate VM and a
notepad.exe window should pop up on the implanted VM.
Impact
A successful attack grants the attacker permission to execute arbitrary code on the implanted device.
References
https://github.com/BishopFox/sliver/blob/master/implant/sliver/cryptography/implant.go
https://github.com/BishopFox/sliver/blob/master/implant/sliver/cryptography/crypto.go
https://github.com/tangent65536/Slivjacker
Credits
Ting-Wei Hsieh from CHT Security Co. Ltd.
Miggo AI
Go