CVE-2017-15597 Information

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.

CVSS Vector

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

Reference

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

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

9.1