Heap-based Buffer Overflow Vulnerability in vim Package
Summary
UBUNTU-CVE-2021-3903: vim is vulnerable to Heap-based Buffer Overflow. Affects vim versions < 2:7.4.052-1ubuntu3.1+esm4. Fixed in 2:7.4.052-1ubuntu3.1+esm4. How to fix ↓
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Background
vim is a highly configurable text editor built to enable efficient text editing. It is widely used in various environments due to its powerful features, including syntax highlighting, multi-level undo, and extensive plugin support. However, it is susceptible to vulnerabilities that can compromise system security, such as the heap-based buffer overflow identified in CVE-2021-3903.
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 lead to arbitrary code execution. Attackers can exploit this vulnerability to execute malicious code, potentially gaining unauthorized access to system resources and sensitive data. The severity of this vulnerability is rated at a CVSS score of 7.8, indicating a high risk to affected systems.
How To Fix
Minimum fixed version
2:7.4.052-1ubuntu3.1+esm4
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 limit the use of vim in environments where the vulnerability may be exploited, or consider using alternative text editors until the package is updated.
Conclusion
The heap-based buffer overflow vulnerability in the vim package poses a significant risk to users. It is crucial to update to the patched versions to mitigate potential security threats. Regular monitoring and prompt updates are essential for maintaining system security.
See every vulnerability recorded for vim →
FAQ
CVE-2021-3903 is a vulnerability in the vim text editor that allows for a heap-based buffer overflow, potentially leading to arbitrary code execution.
You can check your vim version using the command 'vim --version' and compare it against the patched versions listed in the vulnerability report.
Failing to address this vulnerability could allow attackers to execute arbitrary code, leading to unauthorized access and potential data breaches.
Yes, you can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities in your software by analyzing a manifest file like package-lock.json.
Detailed information about CVE-2021-3903 can be found on the official Ubuntu security notices page and various security advisory platforms.
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