Vulnerability Information
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
N/A
Vulnerability Description
QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen QEMU 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。QEMU是法国程序员法布里斯-贝拉（Fabrice Bellard）所研发的一套模拟处理器软件。 Xen 3.3.x版本至4.5.x版本中使用的QEMU中存在安全漏洞，该漏洞源于程序没有正确限制访问PCI命令寄存器。本地虚拟机端攻击者可通过禁用PCI Express设备的内存或I/O解码，并访问该设备利用该漏洞造成拒绝服务（不可屏蔽的中断和主机崩溃）。
CVSS Information
N/A
Vulnerability Type
N/A