CVE:CVE-2014-8867
CNNVD:CNNVD-201411-539
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的acceleration support for the "REP MOVS" instruction中存在安全漏洞，该漏洞源于程序没有对hypervisor上模拟的内存映射I/O（MMIO）执行正确的边界检查。本地HVM虚拟机端攻击者可利用该漏洞造成拒绝服务（主机崩溃）。以下版本受到影响：Xen 4.4.x版本，3.2.x版本，3.2.0及之前版本。
solution:Upgrade redhat enterprise_linux to a higher version than 5.0,and avoid the version 5.0; Upgrade redhat enterprise_linux_desktop to a higher version than 5.0,and avoid the version 5.0; Upgrade xen xen to a higher version than 3.2.0,3.2.1,3.2.2,3.2.3,4.4.0,4.4.1,and avoid the version (,3.2.0],3.2.1,3.2.2,3.2.3,4.4.0,4.4.1; Upgrade debian debian_linux to a higher version than 7.0,and avoid the version 7.0; Upgrade opensuse opensuse to a higher version than 13.1,13.2,and avoid the version 13.1,13.2