Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The do_hvm_op function in xen/arch/x86/hvm/hvm.c in Xen 4.2.x on the x86_32 platform does not prevent HVM_PARAM_NESTEDHVM (aka nested virtualization) operations, which allows guest OS users to cause a denial of service (long-duration page mappings and host OS crash) by leveraging administrative access to an HVM guest in a domain with a large number of VCPUs.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 拒绝服务漏洞
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。 在x86_32平台上的Xen 4.2.x版本中的xen/arch/x86/hvm/hvm.c中的‘do_hvm_op’函数中存在漏洞，该漏洞源于程序没有阻止HVM_PARAM_NESTEDHVM (又名嵌套的虚拟化)操作。通过利用管理员访问权限访问到带有大量的VCPUs域中的HVM客户机，攻击者利用该漏洞导致拒绝服务（持续长时间页面映射和主机操作
CVSS Information
N/A
Vulnerability Type
N/A