CVE-2022-2343 in vim
Summary
by MITRE • 07/08/2022
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0044.
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Analysis
by VulDB Data Team • 05/25/2026
The heap-based buffer overflow vulnerability identified as CVE-2022-2343 exists within the vim text editor repository prior to version 9.0.0044. This vulnerability represents a critical security flaw that can potentially allow remote code execution or denial of service when processing maliciously crafted input. The issue stems from improper memory management during buffer handling operations, specifically within the heap allocation mechanisms used by the vim editor. Such vulnerabilities are particularly dangerous because they can be exploited through various attack vectors including malformed files, network protocols, or user input processing that vim handles during normal operation.
The technical flaw manifests as an improper bounds checking mechanism within the heap memory allocation routines of vim. When the editor processes certain input sequences, it fails to properly validate the size of data being copied or moved into heap-allocated buffers. This allows attackers to write beyond the allocated memory boundaries, potentially overwriting adjacent memory regions with malicious data. The vulnerability falls under CWE-122 which specifically addresses heap-based buffer overflow conditions, where insufficient boundary checking allows data to be written beyond the bounds of allocated heap memory. The flaw is particularly concerning because it can be triggered through normal vim operations without requiring special privileges or complex exploitation techniques.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to potentially enable remote code execution capabilities. An attacker who can convince a victim to open a malicious file or process crafted input through vim could execute arbitrary code on the target system with the privileges of the user running vim. This makes the vulnerability particularly dangerous in environments where users frequently open untrusted documents or when vim is used in automated systems or web applications. The vulnerability affects all versions prior to 9.0.0044, meaning that organizations using older versions of vim are at significant risk of exploitation. The attack surface is broad as vim is widely used across multiple operating systems and platforms, making this a widespread concern for system administrators and security professionals.
Mitigation strategies for CVE-2022-2343 primarily focus on immediate patching and version updates to vim 9.0.0044 or later releases. System administrators should prioritize updating all vim installations to the patched versions to eliminate the heap overflow vulnerability. Additionally, organizations should implement input validation measures and restrict user access to potentially malicious files through network segmentation and application whitelisting. The vulnerability aligns with ATT&CK technique T1059.007 which covers scripting languages and command-line interpreters, as the exploitation could occur through command-line manipulation or script execution. Organizations should also consider implementing runtime monitoring and memory protection mechanisms such as address space layout randomization and stack canaries to reduce the effectiveness of exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems running vulnerable versions of vim and ensure comprehensive coverage of the attack surface.