CVE-2017-15597

HIGH

Description

An issue was discovered in Xen through 4.9.x. Grant copying code made an implication that any grant pin would be accompanied by a suitable page reference. Other portions of code, however, did not match up with that assumption. When such a grant copy operation is being done on a grant of a dying domain, the assumption turns out wrong. A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service. Privilege escalation and information leaks cannot be ruled out.

References

http://www.openwall.com/lists/oss-security/2017/10/24/3

http://www.securityfocus.com/bid/101564

http://www.securitytracker.com/id/1039653

http://xenbits.xen.org/xsa/advisory-236.html

https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html

https://support.citrix.com/article/CTX229057

https://www.debian.org/security/2017/dsa-4050

Details

Source: MITRE

Published: 2017-10-30

Updated: 2018-10-19

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 9

Vector: (AV:N/AC:L/Au:S/C:C/I:C/A:C)

Impact Score: 10

Exploitability Score: 8

Severity: HIGH

CVSS v3.0

Base Score: 9.1

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

Impact Score: 6

Exploitability Score: 2.3

Severity: CRITICAL