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CVE-2021-2119 is a vulnerability in the Core component of Oracle VM VirtualBox affecting supported releases prior to 6.1.18. A high-privileged attacker who can log on to the infrastructure hosting VirtualBox can compromise the product and obtain unauthorized access to critical data or all data accessible to the affected VirtualBox instance. Attacks may also significantly affect additional products.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a full exploit chain for CVE-2021-2119, a VirtualBox 6.1 guest-to-host escape vulnerability. The structure is divided into two main components: a custom Windows kernel driver (in 'kernel_drivers/') and a userspace exploit (in 'userspace/'). The driver, based on the HackSysExtremeVulnerableDriver, exposes several IOCTLs and is intentionally vulnerable. The userspace component interacts with the driver via IOCTLs to perform low-level I/O port operations, memory manipulation, and ultimately triggers the escape from the VirtualBox guest to the host. The exploit requires the vulnerable driver to be loaded in the guest OS and SCSI to be enabled in VirtualBox. The code is operational and provides a working exploit chain, not just a proof of concept. Notable endpoints include the device object '\\Device\\ExploitDriver', its symbolic link '\\DosDevices\\ExploitDriver', and the userland-accessible '\\.\ExploitDriver'. The driver is installed as 'driver.sys' and registered as a service in the Windows registry. The repository is well-structured, with clear separation between kernel and userspace components, and includes build files for both. The README provides context, credits, and mitigation advice.
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