Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The handle_mmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service (guest OS crash) via unspecified operations on MMIO regions.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen HVM客户端用户模式MMIO仿真本地拒绝服务漏洞
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。 Xen 3.3和4.x版本中的MMIO操作模拟器中的arch/x86/hvm/io.c中的‘handle_mmio’函数中存在漏洞。当运行HVM guest时，程序没有正确在仿真周期之间重制某些状态信息。具备本地guest系统用户权限的本地攻击者利用该漏洞通过对MMIO区域的未明操作导致拒绝服务（客户端操作系统崩溃）。
CVSS Information
N/A
Vulnerability Type
N/A