CVE-2021-44850
Xilinx Zynq-7000 SD Boot Image Buffer Overflow Vulnerability
Description
On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated before use, an attacker can modify the boot header stored on an SD card so that a secure image appears to be unencrypted, and they will be able to modify the full range of register initialization values. Normally, these registers will be restricted when booting securely. Of importance to this attack are two registers that control the SD card's transfer type and transfer size. These registers could be modified a way that causes a buffer overflow in the ROM.
INFO
Published Date :
Feb. 10, 2022, 7:15 p.m.
Last Modified :
Aug. 8, 2023, 2:22 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.9
Affected Products
The following products are affected by CVE-2021-44850
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-2021-44850.
| URL | Resource |
|---|---|
| https://support.xilinx.com/s/article/47915 | Vendor Advisory |
| https://support.xilinx.com/s/article/76964 | 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-2021-44850 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-44850 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 -
Initial Analysis by [email protected]
Feb. 17, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://support.xilinx.com/s/article/47915 No Types Assigned https://support.xilinx.com/s/article/47915 Vendor Advisory Changed Reference Type https://support.xilinx.com/s/article/76964 No Types Assigned https://support.xilinx.com/s/article/76964 Vendor Advisory Added CWE NIST CWE-120 Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7012s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7012s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7014s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7014s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7010_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7010:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7015_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7015:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7020_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7020:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7030_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7030:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7035_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7035:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7045_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7045:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7100_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7100:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:xilinx_z-7007s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:xilinx_z-7007s:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-44850 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-2021-44850
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.01%
score
0.34362
percentile