Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
Integer overflow in the pipe_build_write_buffer function (sys/kern/sys_pipe.c) in the direct write optimization feature in the pipe implementation in FreeBSD 7.1 through 7.2 and 6.3 through 6.4 allows local users to bypass virtual-to-physical address lookups and read sensitive information in memory pages via unspecified vectors.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
FreeBSD直接管道写操作本地信息泄露漏洞
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和其他UNIX类系统上最常见的进程间通讯方式之一是匿名管道。这种机制会创建一对文件描述符，可以从一个描述符读取写入到另一个描述符的数据 。 FreeBSD的管道实现中包含名为"直接写入"的优化。在这种优化中，FreeBSD内核利用虚拟内存映射允许直接在进程之间拷贝数据，而不是在调用write(2)时将数据拷贝到内核内存，然后在调用read(2)时再次拷贝数据。在计算包含有所要拷贝数据的页面集时存在整数溢出
CVSS Information
N/A
Vulnerability Type
N/A