The table below provides useful information about the .cfg file extension. It answers questions such as:
Columbian offices will be closed on the following dates in 2021: January 1st - New Year's Day January 18th - Martin Luther King, Jr. Day May 31st - Memorial Day. CFG is a comprehensive healthcare provider that is dedicated to improving quality of life for individuals and families by providing innovative medical and mental health services. Our Health Network includes Center for Family Guidance, CFG Health Systems and CFG Residentials. A.cfg file is basically a generic preference file. It is able to store different settings and configuration information. Many programs are using it for its incredible ability to store data in various formats. If you are wondering how to open.cfg files, then we have to.
- What is the .cfg file?
- What program do I need to open a .cfg file?
- How can the .cfg file be opened, edited or printed?
- How can I convert .cfg files to another format?
Table of Contents
- 🔄 .cfg file converters
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ Configuration File
CNF is a general configuration file extension.
Free Opening Cfg File
Other types of files may also use the .cfg file extension.
🚫 The .cfg file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
Cfg Opener Download
We found the following similar file extensions in our database:
🔴 Can't open a .cfg file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.cfg
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .cfg file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .cfg file extension, write to us!
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-->What is Control Flow Guard?
Control Flow Guard (CFG) is a highly-optimized platform security feature that was created to combat memory corruption vulnerabilities. By placing tight restrictions on where an application can execute code from, it makes it much harder for exploits to execute arbitrary code through vulnerabilities such as buffer overflows. CFG extends previous exploit mitigation technologies such as /GS, DEP, and ASLR.
This feature is available in Microsoft Visual Studio 2015, and runs on 'CFG-Aware' versions of Windows—the x86 and x64 releases for Desktop and Server of Windows 10 and Windows 8.1 Update (KB3000850).
We strongly encourage developers to enable CFG for their applications. You don't have to enable CFG for every part of your code, as a mixture of CFG enabled and non-CFG enabled code will execute fine. But failing to enable CFG for all code can open gaps in the protection. Furthermore, CFG enabled code works fine on 'CFG-Unaware' versions of Windows and is therefore fully compatible with them.
How Can I Enable CFG?
In most cases, there is no need to change source code. All you have to do is add an option to your Visual Studio 2015 project, and the compiler and linker will enable CFG.
The simplest method is to navigate to Project | Properties | Configuration Properties | C/C++ | Code Generation and choose Yes (/guard:cf) for Control Flow Guard.
Alternatively, add /guard:cf to Project | Properties | Configuration Properties | C/C++ | Command Line | Additional Options (for the compiler) and /guard:cf to Project | Properties | Configuration Properties | Linker | Command Line | Additional Options (for the linker).
See /guard (Enable Control Flow Guard) for additional info.
Cfg File Editor
If you are building your project from the command line, you can add the same options. For example, if you are compiling a project called test.cpp, use cl /guard:cf test.cpp /link /guard:cf.
You also have the option of dynamically controlling the set of icall target addresses that are considered valid by CFG using the SetProcessValidCallTargets from the Memory Management API. The same API can be used to specify whether pages are invalid or valid targets for CFG. The VirtualProtect and VirtualAlloc functions will by default treat a specified region of executable and committed pages as valid indirect call targets. It is possible to override this behavior, such as when implementing a Just-in-Time compiler, by specifying PAGE_TARGETS_INVALID when calling VirtualAlloc or PAGE_TARGETS_NO_UPDATE when calling VirtualProtect as detailed under Memory Protection Constants.
How Do I Tell That a Binary is under Control Flow Guard?
Run the dumpbin tool (included in the Visual Studio 2015 installation) from the Visual Studio command prompt with the /headers and /loadconfig options: dumpbin /headers /loadconfig test.exe. The output for a binary under CFG should show that the header values include 'Guard', and that the load config values include 'CF Instrumented' and 'FID table present'.
How Does CFG Really Work?
Software vulnerabilities are often exploited by providing unlikely, unusual, or extreme data to a running program. For example, an attacker can exploit a buffer overflow vulnerability by providing more input to a program than expected, thereby over-running the area reserved by the program to hold a response. This could corrupt adjacent memory that may hold a function pointer. When the program calls through this function it may then jump to an unintended location specified by the attacker.
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However, a potent combination of compile and run-time support from CFG implements control flow integrity that tightly restricts where indirect call instructions can execute.
The compiler does the following:
- Adds lightweight security checks to the compiled code.
- Identifies the set of functions in the application that are valid targets for indirect calls.
The runtime support, provided by the Windows kernel:
- Efficiently maintains state that identifies valid indirect call targets.
- Implements the logic that verifies that an indirect call target is valid.
To illustrate:
Cfg File Viewer
When a CFG check fails at runtime, Windows immediately terminates the program, thus breaking any exploit that attempts to indirectly call an invalid address.