Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.
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 3.17及之前版本的fs/namespace.c文件中的‘do_umount’函数存在安全漏洞，该漏洞源于do_remount_sb调用中没有使用CAP_SYS_ADMIN功能。本地攻击者可通过构造特制的系统调用利用该漏洞造成拒绝服务（失去可写性）。
CVSS Information
N/A
Vulnerability Type
N/A