CVE-2019-19579
Xen DMA Privilege Escalation
Description
An issue was discovered in Xen through 4.12.x allowing attackers to gain host OS privileges via DMA in a situation where an untrusted domain has access to a physical device (and assignable-add is not used), because of an incomplete fix for CVE-2019-18424. XSA-302 relies on the use of libxl's "assignable-add" feature to prepare devices to be assigned to untrusted guests. Unfortunately, this is not considered a strictly required step for device assignment. The PCI passthrough documentation on the wiki describes alternate ways of preparing devices for assignment, and libvirt uses its own ways as well. Hosts where these "alternate" methods are used will still leave the system in a vulnerable state after the device comes back from a guest. An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. Only systems where guests are given direct access to physical devices capable of DMA (PCI pass-through) are vulnerable. Systems which do not use PCI pass-through are not vulnerable.
INFO
Published Date :
Dec. 4, 2019, 10:15 p.m.
Last Modified :
Nov. 7, 2023, 3:07 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.9
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-2019-19579
.
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-2019-19579
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-19579
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 -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJYT5FNGM7JSVHHW6B22TSAATBOAPFPD/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/RJYT5FNGM7JSVHHW6B22TSAATBOAPFPD/ -
CVE Modified by [email protected]
Jan. 14, 2020
Action Type Old Value New Value Added Reference https://seclists.org/bugtraq/2020/Jan/21 [No Types Assigned] -
CVE Modified by [email protected]
Jan. 14, 2020
Action Type Old Value New Value Added Reference https://www.debian.org/security/2020/dsa-4602 [No Types Assigned] -
CVE Modified by [email protected]
Jan. 14, 2020
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.html [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 19, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2019/12/05/7 No Types Assigned http://www.openwall.com/lists/oss-security/2019/12/05/7 Mailing List, Third Party Advisory Changed Reference Type http://xenbits.xen.org/xsa/advisory-306.html No Types Assigned http://xenbits.xen.org/xsa/advisory-306.html Vendor Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RJYT5FNGM7JSVHHW6B22TSAATBOAPFPD/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RJYT5FNGM7JSVHHW6B22TSAATBOAPFPD/ Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2019/11/26/2 No Types Assigned https://www.openwall.com/lists/oss-security/2019/11/26/2 Mailing List, Third Party Advisory Changed Reference Type https://xenbits.xen.org/xsa/advisory-306.html No Types Assigned https://xenbits.xen.org/xsa/advisory-306.html Vendor Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to (including) 4.12.1 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 13, 2019
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RJYT5FNGM7JSVHHW6B22TSAATBOAPFPD/ [No Types Assigned] -
CVE Modified by [email protected]
Dec. 05, 2019
Action Type Old Value New Value Added Reference http://xenbits.xen.org/xsa/advisory-306.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 05, 2019
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2019/12/05/7 [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-2019-19579
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-2019-19579
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.32 }} 0.04%
score
0.67103
percentile