CVE-2021-27379
Xen Intel HVM DMA Read/Write Privilege Escalation Denial of Service Vulnerability
Description
An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.
INFO
Published Date :
Feb. 18, 2021, 5:15 p.m.
Last Modified :
May 27, 2022, 5:09 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
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-2021-27379.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/02/23/1 | Mailing List Third Party Advisory |
| http://xenbits.xen.org/xsa/advisory-366.html | Mitigation Patch Vendor Advisory |
| https://www.debian.org/security/2021/dsa-4888 | Third Party Advisory |
| https://xenbits.xen.org/xsa/advisory-366.html | Patch Vendor 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-27379 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-27379 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.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
May. 27, 2022
Action Type Old Value New Value Changed Reference Type https://www.debian.org/security/2021/dsa-4888 No Types Assigned https://www.debian.org/security/2021/dsa-4888 Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CWE Remap by [email protected]
May. 03, 2022
Action Type Old Value New Value Changed CWE CWE-269 NVD-CWE-OTHER -
CVE Modified by [email protected]
Apr. 11, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4888 [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 30, 2021
Action Type Old Value New Value Changed Reference Type http://xenbits.xen.org/xsa/advisory-366.html No Types Assigned http://xenbits.xen.org/xsa/advisory-366.html Mitigation, Patch, Vendor Advisory -
CVE Modified by [email protected]
Feb. 24, 2021
Action Type Old Value New Value Added Reference http://xenbits.xen.org/xsa/advisory-366.html [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 24, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2021/02/23/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/02/23/1 Mailing List, Third Party Advisory Changed Reference Type https://xenbits.xen.org/xsa/advisory-366.html No Types Assigned https://xenbits.xen.org/xsa/advisory-366.html Patch, Vendor Advisory Added CWE NIST CWE-269 Added CPE Configuration OR *cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* versions from (including) 3.2.0 up to (excluding) 4.12.0 -
CVE Modified by [email protected]
Feb. 23, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/02/23/1 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-27379 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-2021-27379
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile