Heap-based Buffer Overflow Vulnerability in vim
Summary
CVE-2021-3927: 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 powerful features and extensive customization options. It is widely used by developers and system administrators for editing code and configuration files. Unfortunately, a vulnerability has been discovered in vim that allows for a heap-based buffer overflow.
Vulnerability Detail
The heap-based buffer overflow vulnerability in vim arises from a flaw in the way the editor handles certain input. An attacker can exploit this vulnerability by crafting a malicious file or by tricking a user into opening a specially crafted file. Upon opening the file, the buffer overflow occurs, potentially leading to arbitrary code execution or a denial of service. The severity of this vulnerability is rated as high, with a CVSS score of 7.8.
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 avoid opening untrusted or suspicious files with vim. Additionally, it is advisable to exercise caution when downloading files from untrusted sources. By following these precautions, the risk of encountering the vulnerability can be reduced.
Conclusion
The heap-based buffer overflow vulnerability in vim poses a significant risk to systems running vulnerable versions of the text editor. It is crucial to update vim to the latest version and apply the provided patch to mitigate the risk of exploitation. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for vim →
FAQ
The vulnerability allows an attacker to execute arbitrary code or cause a denial of service on a system running a vulnerable version of vim.
Versions of vim up to and including 8.2.3650-r0 are affected by this vulnerability.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the recommended patch to prevent any potential exploitation.
Yes, this vulnerability can be exploited remotely if an attacker can trick a user into opening a malicious file using vim.
Updating vim to the latest version that includes the patch is the most effective mitigation for this vulnerability. Additionally, exercising caution when handling untrusted files can help reduce the risk.
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