Heap-based Buffer Overflow Vulnerability in vim Package
Summary
UBUNTU-CVE-2021-4136: vim is vulnerable to Heap-based Buffer Overflow. Affects vim versions < 2:8.2.3995-1ubuntu2. Fixed in 2:8.2.3995-1ubuntu2. How to fix ↓
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Background
The vim package is a highly configurable text editor used for efficient text editing and programming. It is widely utilized across various operating systems, including Ubuntu. The package offers features such as syntax highlighting, multi-level undo, and a powerful search functionality. However, it has been identified to have a critical vulnerability that could lead to severe security risks if not addressed promptly.
Vulnerability Detail
The vulnerability identified as CVE-2021-4136 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 execute arbitrary code or crash the application. The ramifications of this vulnerability are significant, as it can lead to unauthorized access to sensitive data, system instability, or even complete system compromise. The vulnerability has a CVSS score of 7.8, indicating a high level of risk.
How To Fix
Minimum fixed version
2:8.2.3995-1ubuntu2
This is the first release that contains the fix.
sudo apt-get install --only-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 using features of vim that may trigger the vulnerability until the package is updated. It is advisable to refrain from opening untrusted files with vim until the patch is applied.
Conclusion
The heap-based buffer overflow vulnerability in the vim package poses a significant security risk. It is crucial for users to update to the patched version to protect their systems from potential exploits. Awareness and prompt action are key to maintaining system security.
See every vulnerability recorded for vim →
FAQ
CVE-2021-4136 is a heap-based buffer overflow vulnerability found in the vim package that can lead to arbitrary code execution.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The risks include unauthorized access to sensitive information, potential system crashes, and the possibility of complete system compromise.
Yes, the patched version of the vim package is 2:8.2.3995-1ubuntu2. Users should update to this version to mitigate the risk.
If you cannot update immediately, avoid using vim to open untrusted files and consider using alternative text editors until the update is applied.
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