Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The xenlight library (libxl) in Xen 4.0.x through 4.2.x, when IOMMU is disabled, provides access to a busmastering-capable PCI passthrough device before the IOMMU setup is complete, which allows local HVM guest domains to gain privileges or cause a denial of service via a DMA instruction.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen xenlight库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 4.0.x至4.2.x版本中的xenlight库(libxl)中存在安全漏洞。当使用IOMMU（输入输出内存管理单元）时，在IOMMU设置完成之前，程序提供总线管理功能PCI passthrough设备的访问权限。本地HVM访客域可通过DMA指令利用该漏洞获得权限或造成拒绝服务。
CVSS Information
N/A
Vulnerability Type
N/A