Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
FreeBSD 4.5 and earlier, and possibly other BSD-based operating systems, allows local users to write to or read from restricted files by closing the file descriptors 0 (standard input), 1 (standard output), or 2 (standard error), which may then be reused by a called setuid process that intended to perform I/O on normal files.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
BSD内核exec调用处理C程序库标准I/O文件描述符不当导致权限提升漏洞
Vulnerability Description
BSD Unix是一个Unix类操作系统的重要分支。 基于BSD内核系统实现上在进I/O操作时存在漏洞，导致本地攻击者可能利用此漏洞得到主机的root权限。 基于BSD内核的系统在用exec()调用执行特权程序时，不恰当地假设0、1、2是stdin、stdout、stderr。这样的后果可能出现向2号句柄写入错误提示信息的可能，而当2号句柄并非stderr时，就会破坏实际对应的那个文件。利用这个漏洞，攻击者可以把恶意的数据写到敏感的I/O通道中去，本地攻击者可能因此得到root权限。
CVSS Information
N/A
Vulnerability Type
N/A