CVE-2014-0144 in QEMU
Summary
by MITRE • 09/29/2022
QEMU before 2.0.0 block drivers for CLOOP, QCOW2 version 2 and various other image formats are vulnerable to potential memory corruptions, integer/buffer overflows or crash caused by missing input validations which could allow a remote user to execute arbitrary code on the host with the privileges of the QEMU process.
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Analysis
by VulDB Data Team • 09/29/2022
The vulnerability identified as CVE-2014-0144 represents a critical security flaw affecting QEMU versions prior to 2.0.0, specifically within the block drivers responsible for handling CLOOP, QCOW2 version 2, and various other image formats. This issue stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data during the processing of virtual disk images. The flaw exists in the underlying storage driver implementations that manage how virtual machines interact with their underlying storage backends, creating a pathway for malicious actors to exploit memory corruption vulnerabilities through crafted input data.
The technical exploitation of this vulnerability occurs when QEMU processes malformed or specially crafted disk image files that contain malicious data structures. These malformed inputs trigger integer overflows, buffer overflows, or other memory corruption conditions within the block driver code. The missing input validation allows attackers to bypass normal data sanitization checks that should occur during image parsing and processing, enabling them to manipulate memory layout and potentially execute arbitrary code with the privileges of the QEMU process. This privilege escalation occurs because QEMU typically runs with elevated permissions to access host storage resources, making successful exploitation particularly dangerous.
From an operational impact perspective, this vulnerability creates a significant threat vector for remote code execution attacks against virtualized environments. Attackers can leverage this flaw by uploading malicious disk images to a target system or by manipulating existing virtual machine configurations to trigger the vulnerable code paths. The implications extend beyond simple privilege escalation, as successful exploitation could lead to complete compromise of the host system, allowing attackers to access all data, resources, and services running on the same physical hardware. This makes the vulnerability particularly concerning in cloud computing environments and multi-tenant virtualization setups where isolation between guests is critical.
The vulnerability maps to CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read scenarios, both of which are commonly associated with insufficient input validation in storage and image processing components. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation, as attackers can leverage the memory corruption to gain elevated privileges and execute malicious code. The remediation strategy involves upgrading to QEMU version 2.0.0 or later, which includes comprehensive input validation patches and improved memory management controls. Organizations should also implement strict image validation policies, disable unnecessary virtualization features, and maintain regular security updates to prevent exploitation of similar vulnerabilities in other components of their virtualization infrastructure.