CVE-2022-0559 in radare2
Summary
by MITRE • 02/16/2022
Use After Free in GitHub repository radareorg/radare2 prior to 5.6.2.
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Analysis
by VulDB Data Team • 02/18/2022
The vulnerability CVE-2022-0559 represents a use-after-free condition affecting the radare2 reverse engineering framework, specifically within the github repository radareorg/radare2 before version 5.6.2. This type of vulnerability occurs when a program continues to reference memory after it has been freed, creating potential opportunities for memory corruption and arbitrary code execution. The issue stems from improper memory management practices during the handling of certain data structures within the binary analysis components of the tool. Such vulnerabilities are particularly dangerous in reverse engineering environments where the software processes potentially malicious binary files, as they can be exploited to compromise the integrity of the analysis environment itself.
The technical flaw manifests in the improper handling of memory allocations within the radare2 codebase, where objects are freed from memory but references to these objects persist in various data structures or control flow paths. This creates a window of opportunity for attackers to manipulate the freed memory region and potentially execute malicious code with the privileges of the radare2 process. The vulnerability is classified under CWE-416, which specifically addresses the use of freed memory conditions, and aligns with the broader category of memory safety issues that plague many software applications. The root cause typically involves inadequate null pointer checks, improper object lifecycle management, or race conditions during concurrent memory operations.
The operational impact of this vulnerability extends beyond simple memory corruption, as it can enable attackers to gain unauthorized access to systems where radare2 is deployed for security analysis or penetration testing activities. In enterprise environments where radare2 is used for malware analysis, binary auditing, or security research, exploitation of this vulnerability could lead to complete system compromise. The attack surface is particularly concerning given radare2's widespread adoption in security toolchains and its integration with various security frameworks and automated analysis pipelines. The vulnerability can be exploited through crafted binary files that trigger the specific code path involving the freed memory condition, making it a significant risk for security professionals who rely on the tool for their work.
Mitigation strategies for CVE-2022-0559 primarily focus on upgrading to radare2 version 5.6.2 or later, which includes the necessary memory management fixes. Security practitioners should also implement additional protective measures such as runtime monitoring for memory corruption patterns, sandboxing execution environments for binary analysis, and employing input validation techniques to prevent malicious file processing. The vulnerability demonstrates the critical importance of memory safety practices in security tools, as these applications often handle untrusted data from various sources. Organizations should conduct comprehensive vulnerability assessments to identify systems running affected versions of radare2 and ensure proper patch management protocols are in place. Additionally, implementing network segmentation and access controls around systems where radare2 is deployed can limit the potential impact of exploitation attempts. The incident underscores the necessity for continuous security testing and code review practices to identify and remediate similar memory safety vulnerabilities in security-critical software components.