CVE-2021-44850

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 10-02-2022 08:15

Last modified: - 17-02-2022 06:26

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Low

Attack complexity

Physical

Attack vector

High

Availability

High

Confidentiality

High

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

6.8

Base score

0.9

5.9

Exploitability score

Impact score

Verification logic

AND

vendor=amd AND product=xilinx_z-7012s_firmware AND version=-

vendor=amd AND product=xilinx_z-7012s AND version=-

AND

vendor=amd AND product=xilinx_z-7014s_firmware AND version=-

vendor=amd AND product=xilinx_z-7014s AND version=-

AND

vendor=amd AND product=xilinx_z-7010_firmware AND version=-

vendor=amd AND product=xilinx_z-7010 AND version=-

AND

vendor=amd AND product=xilinx_z-7015_firmware AND version=-

vendor=amd AND product=xilinx_z-7015 AND version=-

AND

vendor=amd AND product=xilinx_z-7020_firmware AND version=-

vendor=amd AND product=xilinx_z-7020 AND version=-

AND

vendor=amd AND product=xilinx_z-7030_firmware AND version=-

vendor=amd AND product=xilinx_z-7030 AND version=-

AND

vendor=amd AND product=xilinx_z-7035_firmware AND version=-

vendor=amd AND product=xilinx_z-7035 AND version=-

AND

vendor=amd AND product=xilinx_z-7045_firmware AND version=-

vendor=amd AND product=xilinx_z-7045 AND version=-

AND

vendor=amd AND product=xilinx_z-7100_firmware AND version=-

vendor=amd AND product=xilinx_z-7100 AND version=-

AND

vendor=amd AND product=xilinx_z-7007s_firmware AND version=-

vendor=amd AND product=xilinx_z-7007s AND version=-

Reference

Keywords

CVE-2021-44850

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-44850

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures