Hardened GNU/Linux

GBE( no big deal?), CPU microcode( Do we really believe the vendor don't leave a backdoor there? Ok, it's unlikely to happen because the "magic" constant shit is not hard to find but...possibility is still there?), VGA BIOS( the 1st rule of OptionROM is do not talk about-_-), MRC( lacking of effort to do the reversing?), [Intel ME](https://github.com/hardenedlinux/firmware-anatomy/blob/master/hack_ME/me_info.md)( red alert....).…

众所周知，混沌计算机俱乐部（AKA“CCC”）是德国最大的黑客社区，成立至今三十多年（每年都会举办黑客大会，今年是第三十三年即33C3。…

We should treat security as a whole, just like the combination of PaX/Grsecurity features/code hardening build up a defense-in-depth solution for Linux kernel, which is a core infrastructre we are highly rely on. PaX/Grsecurity is a set of security hardening specific patch that brings the linux kernel security into another level. It's a great value to make all FLOSS community getting benefit from it. KSPP( Kernel self protection project) was started in Nov 2015 after a disclosure about linux kernel security.…

由于stack overflow而引发的攻击非常普遍也非常古老, 有一种叫做canary的mitigation技术很早就出现在gcc/glibc里, 直到现在也作为系统安全的第一道防线一直存在.…

在Linux系统安全领域数据可以写的存储区就会是攻击的目标,尤其是存储函数指针的区域.GCC,linker以及Glibc-dynamic-linker一起配合实现了一种叫做relro的技术,以最大可能地扩大只读属性的存储区.对于系统级的安全有极大的优点.…

Record how I "neutralize" the ME firmware on my Thinkpad X220, in order to present its way.…

本文提供一系列自由/开源软件 (FLOSS) 项目的最佳实践方法。参照这些最佳实践标准的项目可以进行自认证, 以获得核心基础设施促进会(CII)徽章。…