CVE-2017-15597
A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.0
- 9.1 CRITICALCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 2.83% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-200
- Affected
- xen/xen
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2017/10/24/3Issue Tracking, Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/101564Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039653Issue Tracking, Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-236.htmlIssue Tracking, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
- https://support.citrix.com/article/CTX229057Issue Tracking, Third Party Advisory
- https://www.debian.org/security/2017/dsa-4050
- http://www.openwall.com/lists/oss-security/2017/10/24/3Issue Tracking, Mailing List, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/101564Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039653Issue Tracking, Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-236.htmlIssue Tracking, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
- https://support.citrix.com/article/CTX229057Issue Tracking, Third Party Advisory
- https://www.debian.org/security/2017/dsa-4050
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.