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CVE-2021-44850
CVE ID
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CVE-2021-44850
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
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.
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CVSS V3 Severity and Metrics
General Information
Vendors
- amd
Products
- xilinx z-7007s firmware -,
- xilinx z-7010 firmware -,
- xilinx z-7012s firmware -,
- xilinx z-7014s firmware -,
- xilinx z-7015 firmware -,
- xilinx z-7020 firmware -,
- xilinx z-7030 firmware -,
- xilinx z-7035 firmware -,
- xilinx z-7045 firmware -,
- xilinx z-7100 firmware -
References
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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