In all versions of Node.js 10 prior to 10.9.0, an...

Vulnerability Description

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.

References

• https://access.redhat.com/errata/RHSA-2018:2553
• https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/