CVE-2022-0712 in radare2
Summary
by MITRE • 02/22/2022
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.6.4.
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Analysis
by VulDB Data Team • 02/25/2022
The vulnerability CVE-2022-0712 represents a critical NULL pointer dereference flaw discovered in the radare2 reverse engineering framework prior to version 5.6.4. This issue resides within the radareorg/radare2 GitHub repository and constitutes a fundamental memory safety defect that can lead to arbitrary code execution or system instability. The vulnerability manifests when the software attempts to access a memory location through a pointer that has not been properly initialized or has been set to NULL, creating a dangerous condition that can be exploited by malicious actors. Such flaws are particularly dangerous in reverse engineering tools where the software processes complex binary data structures and memory regions that may contain malformed or unexpected inputs.
The technical implementation of this vulnerability occurs within the radare2 codebase where specific functions fail to validate pointer states before dereferencing them during normal operation. This NULL pointer dereference typically occurs when the software processes certain binary formats or memory segments that trigger code paths where pointers expected to contain valid memory addresses are instead set to NULL values. The flaw can be triggered through crafted input files or specific memory patterns that cause the software to attempt accessing memory through an uninitialized or invalid pointer reference. According to CWE standards, this vulnerability maps directly to CWE-476 which describes NULL Pointer Dereference, a well-documented weakness that has been consistently exploited in various software applications over many years.
The operational impact of this vulnerability extends beyond simple software crashes or hangs, as it provides potential attackers with a pathway for privilege escalation and code execution within the context of the radare2 process. When exploited successfully, the NULL pointer dereference can cause the entire reverse engineering framework to terminate unexpectedly or allow attackers to inject malicious code that executes with the privileges of the radare2 process. This is particularly concerning in security research environments where radare2 is often used to analyze potentially malicious binary files, as an attacker could craft a specially formatted file that triggers this vulnerability when opened by a researcher. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for Command and Scripting Interpreter and T1587.001 for Developer Tools, as it represents a common attack vector that leverages software flaws to gain unauthorized access to systems.
Mitigation strategies for CVE-2022-0712 require immediate patching of affected radare2 installations to version 5.6.4 or later, which contains the necessary code fixes to properly validate pointer states before dereferencing. Organizations should also implement defensive programming practices such as null pointer checks, input validation, and memory sanitization routines to prevent similar issues from occurring in other code paths. Additionally, security teams should consider deploying runtime monitoring solutions that can detect anomalous memory access patterns and pointer dereference operations that may indicate exploitation attempts. The vulnerability highlights the importance of comprehensive code review processes and automated static analysis tools that can identify potential NULL pointer dereference conditions before they can be exploited in production environments. Regular security assessments and penetration testing should also include verification of pointer validation mechanisms within reverse engineering and binary analysis tools to ensure robust protection against such fundamental memory safety issues.