Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The kernel in FreeBSD 6.3 through 7.0 on amd64 platforms can make an extra swapgs call after a General Protection Fault (GPF), which allows local users to gain privileges by triggering a GPF during the kernel's return from (1) an interrupt, (2) a trap, or (3) a system call.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
FreeBSD/amd64 swapgs指令本地权限提升漏洞
Vulnerability Description
FreeBSD就是一种运行在Intel平台上、可以自由使用的开放源码Unix类系统。 FreeBSD/amd64通常用于AMD和Intel CPU的64位系统上。对于Intel CPU，这种架构也被称为EM64T或Intel 64。 用户进程和内核都使用gs段CPU寄存器以方便的访问状态数据。用户进程使用这个寄存器管理每个线程的数据，内核使用这个寄存器管理每个处理器的数据。当处理器进入和离开内核时，会使用swapgs指令在gs寄存器的内核与用户值之间转换。 当处理器在用户与内核级之间切换的时候，会执行一些
CVSS Information
N/A
Vulnerability Type
N/A