Executive Summary

Informations
Name CVE-2019-19338 First vendor Publication 2020-07-13
Vendor Cve Last vendor Modification 2020-07-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 2.1 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19338

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-203 Information Exposure Through Discrepancy

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3329
Os 1

Sources (Detail)

Source Url
CONFIRM https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338
MISC https://software.intel.com/security-software-guidance/insights/deep-dive-inte...
https://www.openwall.com/lists/oss-security/2019/12/10/3

Alert History

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Date Informations
2020-09-17 01:25:12
  • Multiple Updates
2020-08-11 12:25:18
  • Multiple Updates
2020-08-08 01:25:05
  • Multiple Updates
2020-08-07 12:25:34
  • Multiple Updates
2020-08-07 01:26:20
  • Multiple Updates
2020-08-01 12:25:10
  • Multiple Updates
2020-07-29 21:23:10
  • Multiple Updates
2020-07-21 21:23:01
  • Multiple Updates
2020-07-14 00:22:40
  • Multiple Updates
2020-07-13 21:22:58
  • First insertion