CVE-2021-27208
Zynq-7000 NAND Flash Buffer Overflow
Description
When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification of the board assembly on which the Zynq-7000 SoC device mounted is needed to replace the original NAND flash memory with a NAND flash emulation device for this attack to be successful.
INFO
Published Date :
March 15, 2021, 1:15 p.m.
Last Modified :
March 30, 2021, 12:52 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-2021-27208
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-2021-27208.
| URL | Resource |
|---|---|
| http://www.onfi.org/specifications | Not Applicable |
| https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html | Product Vendor Advisory |
| https://www.xilinx.com/support/answers/76201.html | 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-2021-27208 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-27208 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 -
Modified Analysis by [email protected]
Mar. 30, 2021
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 24, 2021
Action Type Old Value New Value Changed Description When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification to the Zynq-7000 device is needed to replace the original nand flash memory with a nand flash emulator for this attack to be successful. When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification of the board assembly on which the Zynq-7000 SoC device mounted is needed to replace the original NAND flash memory with a NAND flash emulation device for this attack to be successful. -
Initial Analysis by [email protected]
Mar. 18, 2021
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 http://www.onfi.org/specifications No Types Assigned http://www.onfi.org/specifications Not Applicable Changed Reference Type https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html No Types Assigned https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html Product, Vendor Advisory Changed Reference Type https://www.xilinx.com/support/answers/76201.html No Types Assigned https://www.xilinx.com/support/answers/76201.html Vendor Advisory Added CWE NIST CWE-120 Added CPE Configuration AND OR *cpe:2.3:o:xilinx:zynq-7000s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:xilinx:zynq-7000s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:xilinx:zynq-7000_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:xilinx:zynq-7000:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 15, 2021
Action Type Old Value New Value Removed Reference https://www.xilinx.com/support.html [No Types Assigned] Added Reference https://www.xilinx.com/support/answers/76201.html [No Types Assigned] Added Reference http://www.onfi.org/specifications [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-27208 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-2021-27208
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.21 }} 0.01%
score
0.58241
percentile