CVE-2021-21556
Dell PowerEdge Server BIOS Denial of Service / Arbitrary Code Execution / Information Disclosure Buffer Overflow Vulnerability
Description
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a stack-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of Service, arbitrary code execution, or information disclosure in UEFI or BIOS Preboot Environment.
INFO
Published Date :
June 14, 2021, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 5:48 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.8
Affected Products
The following products are affected by CVE-2021-21556
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-2021-21556.
| URL | Resource |
|---|---|
| https://www.dell.com/support/kbdoc/000187958 | Vendor Advisory |
| https://www.dell.com/support/kbdoc/000187958 | Vendor 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-2021-21556 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21556 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://www.dell.com/support/kbdoc/000187958 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 23, 2021
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:H/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://www.dell.com/support/kbdoc/000187958 No Types Assigned https://www.dell.com/support/kbdoc/000187958 Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r640_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r640:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r740_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r740:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r740xd_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r740xd:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r940_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r940:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r840_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r840:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_r940xa_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_r940xa:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_t640_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_t640:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_mx740c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_mx740c:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:dell:poweredge_mx840c_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.2 OR cpe:2.3:h:dell:poweredge_mx840c:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21556 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-2021-21556
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
0.05635
percentile