Note:
This project will be discontinued after December 13, 2021. [more]
2017-01-23
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
| Products | Xenserver, Xen |
| Type | Permissions, Privileges, and Access Controls (CWE-264) |
| First patch | - None (likely due to unavailable code) |
| Links |
• https://security.gentoo.org/glsa/201612-56
• http://xenbits.xen.org/xsa/advisory-192.html • http://www.securitytracker.com/id/1037341 • https://support.citrix.com/article/CTX218775 • http://www.securityfocus.com/bid/94470 |