Control Flow Guard (CFG) is a highly-optimized platform security feature that was created to combat memory corruption vulnerabilities.
Qu’est-ce que Control Flow Guard ?Le contrôle Flow Guard (CFG) est une fonctionnalité de sécurité de plateforme hautement optimisée qui a été créée pour lutter contre les vulnérabilités de corruption de la mémoire. En plaçant des restrictions strictes sur l’emplacement d’...
如果你使用这种或类似的执行方法,你会遇到一个阻碍:Microsoft 的 Control Flow Guard (CFG)。 CFG是一种包含在Windows中的反利用技术(从Windows 8.1开始),它可以防止任意代码在程序中间接执行。这可以阻止尝试禁用数据执行保护 (DEP) 或将包含恶意代码的只读/只写缓冲区设置为可执行的攻击。 如果你编译并运行 Ekko...
Windows CFG实现 Windows的CFI实现称为Control Flow Guard(CFG),因为实际的性能要求,不可能做到非常精确的CFI,因此,实际在windows上部署的CFI是粗粒度的、前向CFI。首先,粗粒度的CFI是:所有的有效跳转地址为一个全局的集合,即不精确的为每一个间接跳转指定一个有效跳转地址;其次,什么叫做前向CFI:只考略call,jump的...
Exploring Control Flow Guard in Windows 10 (trendmicro.com) 本文主要来自上面两篇文章,自己做一个记录罢了。 CFG 通过在间接跳转(Indirect Call)前插入校验代码(比如 call dword ptr ss:[ebp-8] 等等 ),检查目标地址的有效性,进而可以阻止执行流跳转到预期之外的地点, 最终及时并有效的进行异常处理,避免引发...
As part of our ongoing efforts towards safer systems programming, we’re pleased to announce that Windows Control Flow Guard (CFG) support is now available in the Clang C/C++ compiler and Rust. What is Control Flow Guard? CFG is a platform security technology designed to enforce control ...
像if语句一样,guard的执行取决于一个表达式的布尔值。我们可以使用guard语句来要求条件必须为真时,以执行guard语句后的代码。不同于if语句,一个guard语句总是有一个else分句,如果条件不为真则执行else分局中的代码。 1 2 3 4 5 6 7 8 9 10 11
1] What is Control Flow Guard and how does it work Control Flow Guard is a feature that makes it harder for exploits to execute arbitrary code through vulnerabilities such asbuffer overflows. As we know, software vulnerabilities are often exploited by providing unlikely, unusual, or extreme data...
Windows的CFI实现称为Control Flow Guard(CFG),因为实际的性能要求,不可能做到非常精确的CFI,因此,实际在windows上部署的CFI是粗粒度的、前向CFI。首先,粗粒度的CFI是:所有的有效跳转地址为一个全局的集合,即不精确的为每一个间接跳转指定一个有效跳转地址;其次,什么叫做前向CFI:只考略call,jump的直接跳转和间接跳...
Activați Control flow guard pe computer Pentru a rula Subsistem Windows pentru Android ™ va trebui să activați Control flow guard (dacă aveți o versiune de Windows cu versiunea 25266 sau o versiune anterioară). Notă:Puteți aflace versiune de sistem...