On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated before use, an attacker can modify the boot header stored on an SD card so that a secure image appears to be unencrypted, and they will be able to modify the full range of register initialization values. Normally, these registers will be restricted when booting securely. Of importance to this attack are two registers that control the SD card's transfer type and transfer size. These registers could be modified a way that causes a buffer overflow in the ROM.

Project Subscriptions

Vendors Products
Xilinx Z-7007s Subscribe
Xilinx Z-7007s Firmware Subscribe
Xilinx Z-7010 Subscribe
Xilinx Z-7010 Firmware Subscribe
Xilinx Z-7012s Subscribe
Xilinx Z-7012s Firmware Subscribe
Xilinx Z-7014s Subscribe
Xilinx Z-7014s Firmware Subscribe
Xilinx Z-7015 Subscribe
Xilinx Z-7015 Firmware Subscribe
Xilinx Z-7020 Subscribe
Xilinx Z-7020 Firmware Subscribe
Xilinx Z-7030 Subscribe
Xilinx Z-7030 Firmware Subscribe
Xilinx Z-7035 Subscribe
Xilinx Z-7035 Firmware Subscribe
Xilinx Z-7045 Subscribe
Xilinx Z-7045 Firmware Subscribe
Xilinx Z-7100 Subscribe
Xilinx Z-7100 Firmware Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2021-31653 On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated before use, an attacker can modify the boot header stored on an SD card so that a secure image appears to be unencrypted, and they will be able to modify the full range of register initialization values. Normally, these registers will be restricted when booting securely. Of importance to this attack are two registers that control the SD card's transfer type and transfer size. These registers could be modified a way that causes a buffer overflow in the ROM.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T04:32:13.265Z

Reserved: 2021-12-13T00:00:00

Link: CVE-2021-44850

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-02-10T19:15:09.273

Modified: 2024-11-21T06:31:36.447

Link: CVE-2021-44850

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses