CVE-2021-27208
IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution.
Does this matter?
Lower severity and a low EPSS score (0.38%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.38% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- xilinx/zynq-7000s firmware · xilinx/zynq-7000 firmware
- Source
- cve@mitre.org
References
- http://www.onfi.org/specificationsNot Applicable
- https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.htmlProduct, Vendor Advisory
- https://www.xilinx.com/support/answers/76201.htmlVendor Advisory
- http://www.onfi.org/specificationsNot Applicable
- https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.htmlProduct, Vendor Advisory
- https://www.xilinx.com/support/answers/76201.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.