Vulnerability Monitor

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CVE-2021-27208

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.

Published

2021-03-15T13:15:14.967

Last Modified

2024-11-21T05:57:34.830

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.8 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-120

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xilinx	zynq-7000s_firmware	-	Yes
Hardware	xilinx	zynq-7000s	-	No
Operating System	xilinx	zynq-7000_firmware	-	Yes
Hardware	xilinx	zynq-7000	-	No

References

http://www.onfi.org/specifications Not Applicable ([email protected])
https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html Product, Vendor Advisory ([email protected])
https://www.xilinx.com/support/answers/76201.html Vendor Advisory ([email protected])
http://www.onfi.org/specifications Not Applicable (af854a3a-2127-422b-91ae-364da2661108)
https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html Product, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.xilinx.com/support/answers/76201.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)