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.

CVSS v3.0 6.8 MEDIUM
CVSS v2.0 4.6 MEDIUM

6.8^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html	Product Vendor Advisory
https://www.xilinx.com/support/answers/76201.html	Vendor Advisory
http://www.onfi.org/specifications	Not Applicable

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:xilinx:zynq-7000s_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:xilinx:zynq-7000s:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:xilinx:zynq-7000_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:xilinx:zynq-7000:-:*:*:*:*:*:*:*

Information

Published : 2021-03-15 06:15

Updated : 2021-03-30 05:52

NVD link : CVE-2021-27208

Mitre link : CVE-2021-27208

JSON object : View

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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Products Affected

xilinx

zynq-7000s
zynq-7000
zynq-7000s_firmware
zynq-7000_firmware

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