CVE-2021-20255
QEMU Eepro100 i8255x Device Emulator Stack Overflow via Infinite Recursion Vulnerability
Description
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
INFO
Published Date :
March 9, 2021, 8:15 p.m.
Last Modified :
Aug. 5, 2022, 5:52 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
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-2021-20255.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1930646 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html | Mailing List Third Party Advisory |
| https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210507-0003/ | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2021/02/25/1 | 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-2021-20255 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20255 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]
Aug. 05, 2022
Action Type Old Value New Value Added CWE NIST CWE-674 -
Modified Analysis by [email protected]
Jun. 03, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20210507-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20210507-0003/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 07, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210507-0003/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 11, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 17, 2021
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:U/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1930646 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1930646 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1 No Types Assigned https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1 Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2021/02/25/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/02/25/1 Mailing List, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20255 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-2021-20255
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.16459
percentile