CVE-2017-10921

HIGH

Description

The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2.

References

http://www.debian.org/security/2017/dsa-3969

http://www.securitytracker.com/id/1038734

https://security.gentoo.org/glsa/201708-03

https://security.gentoo.org/glsa/201710-17

https://xenbits.xen.org/xsa/advisory-224.html

Details

Source: MITRE

Published: 2017-07-05

Updated: 2019-10-03

Type: CWE-119

Risk Information

CVSS v2.0

Base Score: 10

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 10

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

Impact Score: 6

Exploitability Score: 3.9

Severity: CRITICAL