CVE-2021-27208
Severity CVSS v4.0:
Pending analysis
Type:
CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
15/03/2021
Last modified:
30/03/2021
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.
Impact
Base Score 3.x
6.80
Severity 3.x
MEDIUM
Base Score 2.0
4.60
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:xilinx:zynq-7000s_firmware:-:*:*:*:*:*:*:* | ||
| cpe:2.3:h:xilinx:zynq-7000s:-:*:*:*:*:*:*:* | ||
| cpe:2.3:o:xilinx:zynq-7000_firmware:-:*:*:*:*:*:*:* | ||
| cpe:2.3:h:xilinx:zynq-7000:-:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page