Medium severity · published Dec 8, 2018
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…
5.6
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0 · source: NVD
XE
Xen · Xen
through 4.11.1 · source: NVD
XE
Xenserver · Citrix
7.0; 7.1; 7.5; 7.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19965
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19965
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
Third Party Advisory
http://www.securityfocus.com/bid/106182
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/
Patch
https://support.citrix.com/article/CTX239432
Third Party Advisory
https://www.debian.org/security/2019/dsa-4369
Mitigation
https://xenbits.xen.org/xsa/advisory-279.html
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