PT-2021-17323 · Xilinx · Zynq-7000 Soc

Published 2021-03-15 · Updated 2021-03-30 · CVE-2021-27208

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Zynq-7000 SOC device (affected versions not specified)

Description: The issue arises when booting a Zynq-7000 SOC device from nand flash memory. The nand driver in the ROM fails to validate inputs when reading parameters from the nand's parameter page. If a field read from the parameter page is too large, it causes a buffer overflow, potentially leading to arbitrary code execution. This attack requires physical access and modification of the board assembly to replace the original NAND flash memory with a NAND flash emulation device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-27208

Affected Products

Zynq-7000 Soc

References · 5

• https://xilinx.com/products/silicon-devices/soc/zynq-7000.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27208 · Security Note
• https://xilinx.com/support/answers/76201.html · Vendor Advisory
• https://t.me/cvenotify/11333 · Telegram Post
• http://onfi.org/specifications · Note