Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resources outside the namespace, as demonstrated by reading /etc/shadow. This occurs because an ID transformation takes place properly for the namespaced-to-kernel direction but not for the kernel-to-namespaced direction.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 输入验证错误漏洞
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。 Linux kernel 4.15.x版本至4.19.2之前的4.19.x版本中的kernel/user_namespace.c文件的‘map_write()’函数存在安全漏洞。攻击者可利用该漏洞绕过对资源的访问控制。
CVSS Information
N/A
Vulnerability Type
N/A