Vulnerability Information
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Vulnerability Title
Remote code execution via RPCSEC_GSS packet validation
Vulnerability Description
Each RPCSEC_GSS data packet is validated by a routine which checks a signature in the packet. This routine copies a portion of the packet into a stack buffer, but fails to ensure that the buffer is sufficiently large, and a malicious client can trigger a stack overflow. Notably, this does not require the client to authenticate itself first. As kgssapi.ko's RPCSEC_GSS implementation is vulnerable, remote code execution in the kernel is possible by an authenticated user that is able to send packets to the kernel's NFS server while kgssapi.ko is loaded into the kernel. In userspace, applications which have librpcgss_sec loaded and run an RPC server are vulnerable to remote code execution from any client able to send it packets. We are not aware of any such applications in the FreeBSD base system.
CVSS Information
N/A
Vulnerability Type
栈缓冲区溢出
Vulnerability Title
FreeBSD 安全漏洞
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于kgssapi.ko的RPCSEC_GSS实现中验证数据包签名的例程存在栈缓冲区溢出，可能导致远程代码执行。
CVSS Information
N/A
Vulnerability Type
N/A