Improper Input Validation
There is an illegal address access in ast.cpp of LibSass 3.4.5, and 3.5.0.beta.1 through 3.5.0.beta.3. A crafted input will lead to a remote denial of service attack.
CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.