Heap-based Buffer Overflow Vulnerability in vim
Summary
CVE-2021-3968: vim is vulnerable to Heap-based Buffer Overflow. Affects vim versions < 8.2.3650-r0. Fixed in 8.2.3650-r0. How to fix ↓
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Background
vim is a highly popular text editor known for its extensive features and customization options. It is widely used by developers and system administrators for editing code and configuration files. Unfortunately, vim is susceptible to a heap-based buffer overflow vulnerability, which can be exploited by an attacker to execute arbitrary code or crash the application.
Vulnerability Detail
The heap-based buffer overflow vulnerability in vim arises from a flaw in the handling of certain input data. By providing specially crafted input, an attacker can trigger a buffer overflow, leading to the corruption of adjacent memory regions. This can result in the execution of arbitrary code or a denial of service condition. The vulnerability has a CVSS score of 8.0, indicating a high severity level.
How To Fix
Minimum fixed version
8.2.3650-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 workaround, users can consider disabling certain features or plugins in vim that may be vulnerable to the buffer overflow. However, this may impact the functionality and usability of the text editor. It is strongly advised to apply the official fix by updating to the patched version.
Conclusion
The heap-based buffer overflow vulnerability in vim poses a significant risk to systems running vulnerable versions. It is crucial to update to version 8.2.3650-r0 or later to mitigate the risk of exploitation. For further assistance and support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for vim →
FAQ
The vulnerability allows an attacker to execute arbitrary code or crash the vim application, potentially leading to a compromise of the system or a denial of service.
Users of vim versions prior to 8.2.3650-r0 in the Alpine Linux ecosystem (v3.12 and later) are affected by this vulnerability.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is crucial to apply the fix promptly to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if an attacker can provide the malicious input to the vulnerable vim instance.
In addition to updating vim to the patched version, it is always advisable to follow best practices for secure coding and regularly update software to address any potential vulnerabilities.
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