CVE-2018-7166
HighCVSS 7.5Exploitation Probability (EPSS)
High risk86th percentile - higher than 86% of all known CVEs
Summary
In all versions of Node.js 10 prior to 10.9.0, an argument processing flaw can cause `Buffer.alloc()` to return uninitialized memory. This method is intended to be safe and only return initialized, or cleared, memory. The third argument specifying `encoding` can be passed as a number, this is misinterpreted by `Buffer's` internal "fill" method as the `start` to a fill operation. This flaw may be abused where `Buffer.alloc()` arguments are derived from user input to return uncleared memory blocks that may contain sensitive information.
Risk Assessment
This can lead to leakage of sensitive information from memory, posing a serious risk to data confidentiality. Node.js applications processing user input are exposed.
Recommendation
Update Node.js to version 10.9.0 or later. Avoid passing untrusted data as arguments to Buffer.alloc().
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Original NVD description (English source)
In all versions of Node.js 10 prior to 10.9.0, an argument processing flaw can cause `Buffer.alloc()` to return uninitialized memory. This method is intended to be safe and only return initialized, or cleared, memory. The third argument specifying `encoding` can be passed as a number, this is misinterpreted by `Buffer's` internal "fill" method as the `start` to a fill operation. This flaw may be abused where `Buffer.alloc()` arguments are derived from user input to return uncleared memory blocks that may contain sensitive information.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS