CVE-2022-2207 in vim
Summary
by MITRE • 06/27/2022
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 8.2.
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Analysis
by VulDB Data Team • 05/24/2026
The vulnerability identified as CVE-2022-2207 represents a critical heap-based buffer overflow affecting the popular vim text editor repository prior to version 8.2. This issue arises from improper memory management during the processing of certain input data structures within the vim application. The vulnerability stems from a flaw in how the software handles memory allocation and data copying operations, specifically when processing user-supplied input through various command-line interfaces and file parsing functions. The heap-based nature of this buffer overflow indicates that the vulnerability occurs in dynamically allocated memory regions rather than stack-based buffers, making it particularly challenging to detect and exploit reliably. The flaw exists in the core memory management subsystem of vim, which is extensively used across numerous operating systems and development environments, amplifying the potential impact of this vulnerability.
The technical implementation of this vulnerability involves a classic buffer overflow scenario where insufficient bounds checking occurs during memory operations. When vim processes specific input patterns through its command parsing mechanisms, particularly in functions handling file operations or command-line arguments, the software fails to validate the size of incoming data before copying it into pre-allocated heap buffers. This oversight allows attackers to provide malicious input that exceeds the allocated buffer boundaries, resulting in memory corruption that can be leveraged for arbitrary code execution. The vulnerability is particularly concerning because it can be triggered through normal vim usage scenarios such as opening malformed files or executing crafted commands, making exploitation relatively straightforward for attackers with basic knowledge of the software's behavior. The underlying cause aligns with CWE-121, heap-based buffer overflow, which is classified as a fundamental memory safety issue in software development practices.
The operational impact of CVE-2022-2207 extends far beyond individual system compromise due to vim's ubiquitous presence in Unix-like operating systems, development environments, and server configurations. System administrators, developers, and security professionals who rely on vim for daily operations face significant risk exposure, as this vulnerability can be exploited remotely or locally to gain unauthorized access to systems. The potential for privilege escalation exists when the vulnerable vim instance runs with elevated permissions, and the memory corruption can lead to complete system compromise. Additionally, the vulnerability's exploitation can result in denial of service conditions, data corruption, or information disclosure, depending on the specific attack vector and target environment. The widespread adoption of vim across enterprise networks, development teams, and automated systems means that a single compromised instance can potentially affect multiple users and services simultaneously.
Mitigation strategies for CVE-2022-2207 primarily focus on immediate software updates to version 8.2 or later, where the heap buffer overflow has been addressed through proper bounds checking and memory management improvements. Organizations should prioritize patch management processes to ensure all vim installations are updated promptly, particularly in environments where vim is used for system administration tasks or development work. Additional defensive measures include implementing input validation controls, restricting vim execution permissions where possible, and monitoring for suspicious file access patterns that might indicate exploitation attempts. Security teams should consider deploying runtime protection mechanisms such as address space layout randomization and stack canaries to reduce the effectiveness of potential exploitation attempts. The vulnerability also highlights the importance of adhering to secure coding practices and conducting regular security reviews of core system components, aligning with ATT&CK technique T1059.006 for command and scripting interpreter usage and T1203 for exploitation for privilege escalation. Regular security audits and vulnerability assessments should be conducted to identify similar memory safety issues in other critical system components, particularly those with extensive codebases and complex memory management requirements.