How does control-flow integrity work?

How does control-flow integrity work?

In Security. At a high level, Control-Flow Integrity (CFI) restricts the control-flow of an application to valid execution traces. CFI enforces this property by monitoring the program at runtime and comparing its state to a set of precomputed valid states.

What is the goal of control-flow integrity?

Control-flow Integrity (CFI) is a large family of techniques that aims to eradicate memory error exploitation by ensuring that the instruction pointer (IP) of a running process cannot be controlled by a malicious attacker.

What is clang CFI?

Clang includes an implementation of a number of control flow integrity (CFI) schemes, which are designed to abort the program upon detecting certain forms of undefined behavior that can potentially allow attackers to subvert the program’s control flow.

What is control flow in programming?

The control flow is the order in which the computer executes statements in a script. Code is run in order from the first line in the file to the last line, unless the computer runs across the (extremely frequent) structures that change the control flow, such as conditionals and loops.

What is the meaning of control flow integrity?

Control-flow integrity (CFI) is a general term for computer security techniques which prevent a wide variety of malware attacks from redirecting the flow of execution of a program.

How does Intel control flow Enforcement Technology work?

(January 2021) Intel Control-flow Enforcement Technology (CET) detects compromises to control flow integrity with a shadow stack and indirect branch tracking. The shadow stack stores a copy of each CALL in a specially-protected shadow stack and on a RET, checks if the return address stored in the normal stack and shadow stack are equal.

When did Control Flow Guard come out for Windows?

Control Flow Guard (CFG) was first released for Windows 8.1 Update 3 (KB3000850) in November 2014. Developers can add CFG to their programs by adding the /guard:cf linker flag before program linking in Visual Studio 2015 or newer.