Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 权限许可和访问控制漏洞
Vulnerability Description
Xen是英国剑桥大学开发的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.4.x及之前版本的arch/x86/x86_emulate/x86_emulate.c文件中的‘x86_emulate’函数存在安全漏洞，该漏洞源于程序没有正确检查管理模式的权限。本地虚拟机端攻击者可利用该漏洞造成拒绝服务（虚拟机崩溃）或获取内核模式权限。
CVSS Information
N/A
Vulnerability Type
N/A