Heap-based Buffer Overflow Vulnerability in vim Package
Summary
ALPINE-CVE-2021-3903: vim is vulnerable to Heap-based Buffer Overflow. Affects vim versions < 8.2.3567-r0. Fixed in 8.2.3567-r0. How to fix ↓
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Background
The vim package is a widely used text editor that provides powerful editing capabilities for various programming languages and text files. Known for its efficiency and extensibility, vim is a staple tool among developers and system administrators. However, it has been identified to have a critical vulnerability that can lead to severe security implications if not addressed promptly.
Vulnerability Detail
The vulnerability identified as CVE-2021-3903 in the vim package is a heap-based buffer overflow. This issue arises from improper handling of memory allocation, which can allow an attacker to exploit the vulnerability by crafting specific input that exceeds the allocated buffer size. The ramifications of this vulnerability are significant, as it could lead to arbitrary code execution, data corruption, or system crashes. The CVSS score for this vulnerability is 7.8, indicating a high severity level that necessitates immediate attention.
How To Fix
Minimum fixed version
8.2.3567-r0
This is the first release that contains the fix.
sudo apk add --upgrade vimTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can avoid using features of vim that may trigger the vulnerability until the package is updated. Additionally, running vim in a restricted environment or using alternative text editors can help minimize exposure to potential exploits.
Conclusion
The heap-based buffer overflow vulnerability in the vim package (CVE-2021-3903) poses a significant risk to users. It is crucial to update to the patched version 8.2.3567-r0 to mitigate potential exploits. Users are encouraged to monitor their software for vulnerabilities using tools like Vulert.
See every vulnerability recorded for vim →
FAQ
CVE-2021-3903 is a vulnerability in the vim package that allows for a heap-based buffer overflow, potentially leading to arbitrary code execution.
You can check if your version of vim is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities.
If an immediate update is not possible, consider using alternative text editors or restricting the use of vim features that may trigger the vulnerability.
Failing to address this vulnerability can lead to severe consequences, including unauthorized access, data loss, and system instability.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
References
Related vulnerabilities
Recent vulnerabilities recorded for vim.
