CVE-2021-3748
QEMU Virtio-Net Device Use-After-Free Vulnerability (Denial of Service/Code Execution)
Description
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
INFO
Published Date :
March 23, 2022, 8:15 p.m.
Last Modified :
Jan. 3, 2023, 3:16 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
6.0
Exploitability Score :
0.8
Affected Products
The following products are affected by CVE-2021-3748
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-2021-3748.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1998514 | Issue Tracking Patch Third Party Advisory |
| https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html | Mailing List Third Party Advisory |
| https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html | Mailing List Patch Third Party Advisory |
| https://security.gentoo.org/glsa/202208-27 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220425-0004/ | Third Party Advisory |
| https://ubuntu.com/security/CVE-2021-3748 | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3748 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3748 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 -
Reanalysis by [email protected]
Jan. 03, 2023
Action Type Old Value New Value Removed CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Removed CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CVSS V3.1 NIST AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H -
Modified Analysis by [email protected]
Oct. 26, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory Changed Reference Type https://security.gentoo.org/glsa/202208-27 No Types Assigned https://security.gentoo.org/glsa/202208-27 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 05, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html [No Types Assigned] -
CVE Modified by [email protected]
Aug. 15, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202208-27 [No Types Assigned] -
Modified Analysis by [email protected]
May. 13, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20220425-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* *cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 25, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220425-0004/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 04, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 29, 2022
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:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1998514 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 No Types Assigned https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch, Third Party Advisory Changed Reference Type https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html No Types Assigned https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List, Patch, Third Party Advisory Changed Reference Type https://ubuntu.com/security/CVE-2021-3748 No Types Assigned https://ubuntu.com/security/CVE-2021-3748 Patch, Third Party Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions from (including) 0.10.0 up to (excluding) 6.2.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3748 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-2021-3748
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
0.12157
percentile