The acceleration support for the “REP MOVS” instruction in Xen 4.4.x, 3.2.x, and earlier lacks properly bounds checking for memory mapped I/O (MMIO) emulated in the hypervisor, which allows local HVM guests to cause a denial of service (host crash) via unspecified vectors.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8867
Reference (s):
- BID:71331
- URL: http://www.securityfocus.com/bid/71331
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- http://support.citrix.com/article/CTX200288
- http://support.citrix.com/article/CTX201794