CVE-2021-44850
On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM.
Does this matter?
Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own.
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.
- 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
- 0.19% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-345
- Affected
- amd/xilinx z-7012s firmware · amd/xilinx z-7014s firmware · amd/xilinx z-7010 firmware · amd/xilinx z-7015 firmware · amd/xilinx z-7020 firmware · amd/xilinx z-7030 firmware · amd/xilinx z-7035 firmware · amd/xilinx z-7045 firmware · amd/xilinx z-7100 firmware · amd/xilinx z-7007s firmware
- Source
- cve@mitre.org
References
- https://support.xilinx.com/s/article/47915Vendor Advisory
- https://support.xilinx.com/s/article/76964Vendor Advisory
- https://support.xilinx.com/s/article/47915Vendor Advisory
- https://support.xilinx.com/s/article/76964Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.