Description
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.
Published: 2022-02-10
Score: 6.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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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.
History

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Subscriptions

Amd Xilinx Z-7007s Xilinx Z-7007s Firmware Xilinx Z-7010 Xilinx Z-7010 Firmware Xilinx Z-7012s Xilinx Z-7012s Firmware Xilinx Z-7014s Xilinx Z-7014s Firmware Xilinx Z-7015 Xilinx Z-7015 Firmware Xilinx Z-7020 Xilinx Z-7020 Firmware Xilinx Z-7030 Xilinx Z-7030 Firmware Xilinx Z-7035 Xilinx Z-7035 Firmware Xilinx Z-7045 Xilinx Z-7045 Firmware Xilinx Z-7100 Xilinx Z-7100 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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

Reserved: 2021-12-13T00:00:00.000Z

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