Buffer Over-Read Vulnerability in Node-bl Package: CVE-2020-8244
Summary
CVE-2020-8244: A buffer over-read vulnerability exists in bl. Affects node-bl across 2 version ranges.
< 4.0.3-1
< d69edfd66f2b1d8b50abc0ecfe42216437540178
Fixed in 4.0.3-1. How to fix ↓
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Background
Node-bl is a popular Node.js package used for handling binary data streams. It provides a BufferList class that allows for efficient manipulation of binary data. However, certain versions of this package are vulnerable to a buffer over-read issue that can lead to the exposure of uninitialized memory, potentially compromising application security.
Vulnerability Detail
CVE-2020-8244 is a buffer over-read vulnerability found in versions of the node-bl package prior to 4.0.3, 3.0.1, 2.2.1, and 1.2.3. This vulnerability arises when user input is improperly handled in the consume() function, allowing an attacker to manipulate the BufferList state. If the input becomes negative, it can lead to the exposure of uninitialized memory through regular .slice() calls, posing a significant risk to data integrity and confidentiality.
How To Fix
Minimum fixed version
4.0.3-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade node-blTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider implementing input validation to ensure that user inputs do not lead to negative values before they are passed to the consume() function. This can help mitigate the risk until an update can be applied.
Conclusion
CVE-2020-8244 represents a significant security risk for applications using vulnerable versions of the node-bl package. It is crucial to update to the latest version to mitigate potential threats. Additionally, utilizing tools like Vulert can help monitor and alert for open-source vulnerabilities in your software.
See every vulnerability recorded for node-bl →
FAQ
CVE-2020-8244 is a buffer over-read vulnerability in the node-bl package that can expose uninitialized memory.
Versions of node-bl prior to 4.0.3, 3.0.1, 2.2.1, and 1.2.3 are affected by this vulnerability.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The vulnerability can lead to the exposure of sensitive data and uninitialized memory, which may be exploited by attackers.
The CVSS score for CVE-2020-8244 is 6.5, indicating a medium severity level.
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