CVE-2018-19965

Severity

47%

Complexity

34%

Confidentiality

115%

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.

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 3.0 Base Score 5.6. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.7. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:N/I:N/A:C).

Overview

First reported 6 years ago

2018-12-08 04:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Xen

Citrix XenServer 7.0

7.0

Citrix XenServer 7.5

7.5

Debian Linux 9.0

9.0

References

openSUSE-SU-2019:1226

106182

Third Party Advisory, VDB Entry

FEDORA-2019-bce6498890

https://support.citrix.com/article/CTX239432

Patch, Third Party Advisory

DSA-4369

Third Party Advisory

https://xenbits.xen.org/xsa/advisory-279.html

Mitigation, Patch, Vendor Advisory

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