Critical Buffer Overflow Vulnerability in Node.js: CVE-2018-12115
Summary
UBUNTU-CVE-2018-12115: In all versions of Node.js prior to 6.14.4, 8.11.4 and 10.9.0 when used with UCS-2 encoding (recognized by Node.js under the names 'ucs2', 'ucs-2', 'utf16le' and 'utf-16le'), Buffer#write() can be abused to write outside... Affects nodejs versions 0.10.15~dfsg1-4 – 0.10.25~dfsg2-2ubuntu1.2+esm2. No fix is published. How to fix ↓
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Background
Node.js is a popular open-source runtime environment that allows developers to execute JavaScript code server-side. It is widely used for building scalable network applications. The affected versions of Node.js are vulnerable to a buffer overflow issue when using UCS-2 encoding, which can lead to potential security risks.
Vulnerability Detail
In all versions of Node.js prior to 6.14.4, 8.11.4, and 10.9.0, when used with UCS-2 encoding (recognized by Node.js under the names 'ucs2', 'ucs-2', 'utf16le', and 'utf-16le'), the Buffer#write() method can be exploited to write outside the bounds of a single Buffer. This miscalculation of the maximum length of the input bytes can lead to memory corruption, potentially allowing an attacker to execute arbitrary code or crash the application.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If immediate patching is not possible, consider using alternative encoding methods that do not trigger this vulnerability, or implement input validation to restrict the data being written to the Buffer.
Conclusion
CVE-2018-12115 is a critical vulnerability in Node.js that can lead to severe security risks if not addressed. It is essential to update to the patched versions or implement workarounds to protect your applications from potential exploitation.
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FAQ
CVE-2018-12115 is a vulnerability in Node.js that allows for buffer overflow when using UCS-2 encoding, potentially leading to memory corruption.
All versions of Node.js prior to 6.14.4, 8.11.4, and 10.9.0 are affected by this vulnerability.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application against this vulnerability using the Vulert playground at Vulert Scanner.
Exploitation of this vulnerability can lead to memory corruption, allowing attackers to execute arbitrary code or crash the application.
Consider using alternative encoding methods or implementing input validation to restrict the data being written to the Buffer.
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