CVE-2017-15597

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.

How to fix CVE-2017-15597

To remediate CVE-2017-15597, upgrade the affected package to a fixed version below.

• —upgrade to 4.9.0-r7 or later
• —upgrade to 4.8.2+xsa245-0+deb9u1 or later

Is CVE-2017-15597 being exploited?

Low — EPSS is 1.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.9.0-r7
• from 0, < 4.8.2+xsa245-0+deb9u1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2017-15597
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2017-15597