CVE-2019-19338
"Intel CPU Linux Kernel TSX Asynchronous Abort Confidentiality Vulnerability"
Description
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.
INFO
Published Date :
July 13, 2020, 5:15 p.m.
Last Modified :
Nov. 21, 2024, 4:34 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2019-19338 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-19338.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 | Issue Tracking Patch Third Party Advisory |
| https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2019/12/10/3 | Mailing List Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 | Issue Tracking Patch Third Party Advisory |
| https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2019/12/10/3 | Mailing List Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2019-19338 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-19338 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 Added Reference https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort Added Reference https://www.openwall.com/lists/oss-security/2019/12/10/3 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jul. 21, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort No Types Assigned https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2019/12/10/3 No Types Assigned https://www.openwall.com/lists/oss-security/2019/12/10/3 Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-203 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.5 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-19338 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-19338
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.14957
percentile