Buffer.allocUnsafe() 与 Buffer.allocUnsafeSlow() 不安全的原因
调用 Buffer.allocUnsafe()
和 Buffer.allocUnsafeSlow()
时,分配的内存段未初始化(未清零)。
虽然这种设计使内存分配非常快,但分配的内存段可能包含潜在敏感的旧数据。
使用 Buffer.allocUnsafe()
创建的 Buffer
而不完全覆盖内存可以允许在读取 Buffer
内存时泄漏这些旧数据。
虽然使用 Buffer.allocUnsafe()
有明显的性能优势,但必须格外小心,以避免将安全漏洞引入应用程序。
When calling Buffer.allocUnsafe()
and Buffer.allocUnsafeSlow()
, the
segment of allocated memory is uninitialized (it is not zeroed-out). While
this design makes the allocation of memory quite fast, the allocated segment of
memory might contain old data that is potentially sensitive. Using a Buffer
created by Buffer.allocUnsafe()
without completely overwriting the
memory can allow this old data to be leaked when the Buffer
memory is read.
While there are clear performance advantages to using
Buffer.allocUnsafe()
, extra care must be taken in order to avoid
introducing security vulnerabilities into an application.