CVE-2023-2008 PoC — Kernel: udmabuf: improper validation of array index leading to local privilege escalation

Source

https://github.com/bluefrostsecurity/CVE-2023-2008

Associated Vulnerability

Title: Kernel: udmabuf: improper validation of array index leading to local privilege escalation (CVE-2023-2008)
Description:A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Description

Proof of concept code for CVE-2023-2008

Readme

# CVE-2023-2008

Proof of concept exploit for CVE-2023-2008, a bug in the udmabuf driver of the 
Linux kernel fixed in 5.19-rc4.

You can find a description of the bug and the exploitation strategy in our [blog post](https://labs.bluefrostsecurity.de/blog/cve-2023-2008.html).

The exploit was tested on a vulnerable Ubuntu 22.04, and it requires access to the `/dev/udmabuf` device. This is only accessible to users in the `kvm` group, so you may need to add your test user to this group when testing the exploit.

To test, simply compile with gcc and run the resulting binary.

File Snapshot

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