Dynamic taint tracking in abstract syntax tree interpreters
US11947677B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2020 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Apr 10, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/033
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method may include determining that a non-constant value of a variable corresponding to a variable node of the abstract syntax tree flows into an operator node in the abstract syntax tree. The method may further include adding, to the abstract syntax tree, a check taint node including functionality to: make a taint status determination that the non-constant value is tainted, and return the non-constant value to the operator node. The operator node generates a result value by executing an operator using the non-constant value. The method may further include adding, to the abstract syntax tree, a set taint node that stores, based on the taint status determination, the result value in a second tainted object, and performing, using the abstract syntax tree, a taint analysis of the source code to identify a vulnerability in the source code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.