CVE-2021-3631
Libvirt SELinux MCS Category Pairing vulnerability (Privilege Escalation)
Description
A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
INFO
Published Date :
March 2, 2022, 11:15 p.m.
Last Modified :
April 1, 2024, 1:16 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.2
Exploitability Score :
1.0
Affected Products
The following products are affected by CVE-2021-3631
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-3631.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2021:3631 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1977726 | Issue Tracking Vendor Advisory |
| https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 | Patch Third Party Advisory |
| https://gitlab.com/libvirt/libvirt/-/issues/153 | Exploit Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html | |
| https://security.gentoo.org/glsa/202210-06 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220331-0010/ | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3631 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3631 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]
Apr. 01, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html [No types assigned] -
Modified Analysis by [email protected]
Oct. 28, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202210-06 No Types Assigned https://security.gentoo.org/glsa/202210-06 Third Party Advisory -
CVE Modified by [email protected]
Oct. 16, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202210-06 [No Types Assigned] -
Modified Analysis by [email protected]
Jun. 04, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20220331-0010/ No Types Assigned https://security.netapp.com/advisory/ntap-20220331-0010/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 31, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220331-0010/ [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://access.redhat.com/errata/RHSA-2021:3631 No Types Assigned https://access.redhat.com/errata/RHSA-2021:3631 Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1977726 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1977726 Issue Tracking, Vendor Advisory Changed Reference Type https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 No Types Assigned https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 Patch, Third Party Advisory Changed Reference Type https://gitlab.com/libvirt/libvirt/-/issues/153 No Types Assigned https://gitlab.com/libvirt/libvirt/-/issues/153 Exploit, Third Party Advisory Added CWE NIST CWE-732 Added CPE Configuration OR *cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* versions up to (excluding) 7.5.0 Added CPE Configuration OR *cpe:2.3:a:redhat:openshift_container_platform:4.8:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3631 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-2021-3631
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.02%
score
0.26529
percentile