CVE-2021-20257
QEMU e1000 Infinite Loop Denial of Service<span></span>
Description
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
INFO
Published Date :
March 16, 2022, 3:15 p.m.
Last Modified :
Feb. 12, 2023, 10:15 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
4.0
Exploitability Score :
2.0
Affected Products
The following products are affected by CVE-2021-20257
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-2021-20257.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1930087 | Issue Tracking Patch Third Party Advisory |
| https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html | Mailing List Third Party Advisory |
| https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html | Mailing List Patch Vendor Advisory |
| https://security.gentoo.org/glsa/202208-27 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220425-0003/ | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2021/02/25/2 | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20257 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20257 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]
Feb. 12, 2023
Action Type Old Value New Value Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L Removed Reference https://access.redhat.com/errata/RHSA-2021:5238 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2022:0081 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2021-20257 [No Types Assigned] Added CWE Red Hat, Inc. CWE-835 -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Added CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L Added Reference https://access.redhat.com/security/cve/CVE-2021-20257 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:0081 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2021:5238 [No Types Assigned] Removed CWE Red Hat, Inc. CWE-835 -
Modified Analysis by [email protected]
Sep. 23, 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 Added CPE Configuration OR *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. 12, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20220425-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 25, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220425-0003/ [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 22, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1930087 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 No Types Assigned https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch, Third Party Advisory Changed Reference Type https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html No Types Assigned https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List, Patch, Vendor Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2021/02/25/2 No Types Assigned https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-835 Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions 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-2021-20257 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-2021-20257
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
0.12177
percentile