Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.
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 3.17.4及之前版本中存在安全漏洞，该漏洞源于程序没有正确限删除制特定命名空间中的附加组成员。本地攻击者可借助特制的POSIX ACL利用该漏洞绕过既定的文件权限。
CVSS Information
N/A
Vulnerability Type
N/A