CVE-2017-7228 Information

Description

An issue (known as XSA-212) was discovered in Xen with fixes available for 4.8.x 4.7.x 4.6.x 4.5.x and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Reference

http://openwall.com/lists/oss-security/2017/04/04/3 http://www.debian.org/security/2017/dsa-3847 http://www.securityfocus.com/bid/97375 http://www.securitytracker.com/id/1038223 http://xenbits.xen.org/xsa/advisory-212.html https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.html https://www.exploit-db.com/exploits/41870/

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.2