Meltdown — Citrix Xenserver Vulnerability
CVE-2018-19965
An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (host OS crash) because #GP[0] can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 (aka Meltdown) mitigation.
EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Citrix Xenserver — versions 7.0, 7.1, 7.5
- Xen
- Debian Debian_linux — versions 9.0
- N/a — versions n/a
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- cve@mitre.org (Patch, x_refsource_MISC, Mitigation, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA)
- cve@mitre.org (vendor-advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2018-19965?
- CVE-2018-19965 is a medium-severity vulnerability in Citrix Xenserver. CVSS score: 5.6/10. Published 2018-12-08.
- How severe is CVE-2018-19965?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2018-19965 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.