CVE-2022-2344 in vim
Summary
by MITRE • 07/08/2022
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0045.
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Analysis
by VulDB Data Team • 05/25/2026
The heap-based buffer overflow vulnerability identified as CVE-2022-2344 affects the popular vim text editor repository before version 9.0.0045. This vulnerability resides within the heap memory management system of the software and represents a critical security flaw that can potentially allow remote code execution or denial of service attacks. The vulnerability stems from improper bounds checking during memory allocation operations, specifically when processing certain input data structures within the vim editor's codebase. The flaw manifests when the application attempts to write data beyond the allocated heap buffer boundaries, creating potential exploitation vectors for malicious actors.
This buffer overflow vulnerability falls under the CWE-122 category of "Heap-based Buffer Overflow" which is classified as a fundamental memory safety issue in software development practices. The technical implementation flaw occurs during the handling of specific file formats or input processing routines where vim fails to validate the size of incoming data against allocated buffer space. The heap memory allocation mechanism in vim does not properly enforce bounds checking, allowing attackers to craft malicious inputs that exceed the intended buffer limits. This creates a condition where subsequent memory writes can overwrite adjacent heap memory regions, potentially corrupting program execution flow or allowing arbitrary code execution.
The operational impact of CVE-2022-2344 extends beyond simple denial of service scenarios as it represents a significant threat to system integrity and availability. When exploited, this vulnerability can enable attackers to execute arbitrary code with the privileges of the vim process, potentially leading to complete system compromise. The vulnerability affects all systems running vim versions prior to 9.0.0045 and is particularly concerning given vim's widespread deployment across Unix-like systems, development environments, and server infrastructure. Attackers can leverage this flaw through various attack vectors including opening malicious files, processing specially crafted input during text editing operations, or exploiting network-based file transfers that utilize vim for content manipulation.
Security practitioners should prioritize immediate patching of affected vim installations to mitigate this vulnerability. The recommended mitigation strategy involves upgrading to vim version 9.0.0045 or later which contains the necessary code fixes for heap buffer overflow protection. Additionally, system administrators should implement network segmentation controls and access restrictions to limit exposure of vulnerable systems. The vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1203 for Exploitation for Client Execution, indicating potential attack paths through malicious file processing. Organizations should also consider implementing memory protection mechanisms such as stack canaries, address space layout randomization, and heap integrity checks as additional defensive measures. Regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of the vulnerable software version within the enterprise environment.