Heap-based Buffer Overflow Vulnerability in vim Package
Summary
ALPINE-CVE-2021-4136: vim is vulnerable to Heap-based Buffer Overflow. Affects vim versions < 8.2.4173-r0. Fixed in 8.2.4173-r0. How to fix ↓
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Background
The vim package is a widely used text editor that provides a powerful and flexible environment for editing text files. It is known for its efficiency and extensive feature set, making it a popular choice among developers and system administrators. However, the vim package is susceptible to a heap-based buffer overflow vulnerability, which can lead to severe security issues if not addressed promptly.
Vulnerability Detail
The vulnerability identified as ALPINE-CVE-2021-4136 is a heap-based buffer overflow in the vim package. This flaw arises from improper handling of memory allocation, allowing an attacker to exploit the vulnerability by crafting specific input. The potential ramifications include arbitrary code execution, data corruption, and system crashes, posing significant risks to the integrity and availability of affected systems. The CVSS score for this vulnerability is 7.8, indicating a high severity level.
How To Fix
Minimum fixed version
8.2.4173-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 limit the input size to the vim editor to mitigate the risk of exploitation until the package is updated. This can be done by configuring the editor settings to restrict file sizes or by using alternative text editors that do not exhibit this vulnerability.
Conclusion
The heap-based buffer overflow vulnerability in the vim package poses significant security risks that must be addressed promptly. By updating to the patched version 8.2.4173-r0, users can mitigate these risks effectively. Additionally, utilizing tools like Vulert can help monitor for vulnerabilities in your software environment.
See every vulnerability recorded for vim →
FAQ
A heap-based buffer overflow occurs when a program writes more data to a buffer located on the heap than it can hold, potentially overwriting adjacent memory and leading to unpredictable behavior or security vulnerabilities.
You can check if your vim installation is affected by using the Vulert playground at Vulert Scanner. Simply upload your manifest file to see if your application is vulnerable.
Failing to fix this vulnerability can lead to severe security risks, including unauthorized access, data loss, and system instability, which can compromise the overall security of your environment.
Yes, you can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
If immediate updates are not possible, consider implementing workarounds such as limiting input sizes or using alternative text editors until the update can be applied.
References
Related vulnerabilities
Recent vulnerabilities recorded for vim.
