Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 权限许可和访问控制问题漏洞
Vulnerability Description
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。NFSv4 implementation是其中的一个分布式文件系统协议。 Linux kernel 3.16.1及之前版本的fs/namespace.c文件中‘do_remount’函数存在安全漏洞，该漏洞源于在用户命名空间中重装只读的挂载时，程序会将MNT_LOCK_READONLY位清空。本地攻击者可通过在用户命名空间执行‘mount -o remount’命令利用该漏洞绕过既定的只读限制，破坏特定的沙箱保护机制。
CVSS Information
N/A
Vulnerability Type
N/A