When booting a Zync-7000 SOC device from nand flash memory,...

Vulnerability 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.

References

• https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html
• https://www.xilinx.com/support/answers/76201.html
• http://www.onfi.org/specifications