CVE-2012-2449 in Workstation
Summary
by MITRE
VMware Workstation 8.x before 8.0.3, VMware Player 4.x before 4.0.3, VMware Fusion 4.x through 4.1.2, VMware ESXi 3.5 through 5.0, and VMware ESX 3.5 through 4.1 do not properly configure the virtual floppy device, which allows guest OS users to cause a denial of service (out-of-bounds write operation and VMX process crash) or possibly execute arbitrary code on the host OS by leveraging administrative privileges on the guest OS.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability identified as CVE-2012-2449 represents a critical security flaw in multiple VMware virtualization products that affects versions prior to specific patch releases. This issue stems from improper configuration of the virtual floppy device within the virtual machine environment, creating a pathway for privilege escalation and potential code execution on the host system. The vulnerability specifically impacts VMware Workstation 8.x before 8.0.3, VMware Player 4.x before 4.0.3, VMware Fusion 4.x through 4.1.2, and various versions of VMware ESXi 3.5 through 5.0 and ESX 3.5 through 4.1. The flaw exists in the way these virtualization platforms handle input validation for floppy disk operations, creating an exploitable condition that can be leveraged by malicious actors with administrative access within the guest operating system.
The technical implementation of this vulnerability involves an out-of-bounds write operation that occurs when the virtual floppy device processes malformed input data. When a guest operating system user with administrative privileges manipulates the virtual floppy device through specific input sequences, the VMX process handling the virtualization layer experiences memory corruption that leads to either a denial of service condition or arbitrary code execution on the host system. This represents a classic privilege escalation vulnerability where guest-level access is leveraged to gain host-level capabilities, with the potential for complete system compromise. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-787, which addresses out-of-bounds write operations in memory management.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to potentially enable complete host compromise when exploited by attackers with guest administrative access. In enterprise environments where virtualization is extensively used, this vulnerability could allow attackers to pivot from compromised virtual machines to the underlying physical infrastructure, creating a significant escalation path for malicious activities. The vulnerability affects both desktop virtualization products like VMware Workstation and Player, as well as server virtualization platforms including ESXi and ESX, making it particularly dangerous in environments where multiple virtualization technologies coexist. Security professionals should note that this vulnerability is particularly concerning because it requires only guest administrative privileges to exploit, meaning that a compromised virtual machine could immediately threaten the integrity of the entire host system.
Mitigation strategies for CVE-2012-2449 primarily involve applying the vendor-provided patches and updates for the affected VMware products. Organizations should immediately upgrade to the patched versions of VMware Workstation 8.0.3, VMware Player 4.0.3, and the corresponding versions of VMware Fusion, ESXi, and ESX to eliminate this vulnerability. Additionally, security teams should consider implementing network segmentation and access controls to limit guest administrative privileges where possible, as well as monitoring for unusual virtual floppy device activity that might indicate exploitation attempts. The vulnerability's classification under ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation indicates that exploitation would likely involve command execution within the virtual environment followed by privilege escalation to host-level access. Organizations should also consider implementing virtual machine monitoring solutions that can detect anomalous behavior patterns associated with buffer overflow exploitation attempts and memory corruption activities that may indicate this vulnerability being actively exploited.