CVE-2021-44850
CVSS V2 Medium 4.6
CVSS V3 Medium 6.8
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.
Overview
- CVE ID
- CVE-2021-44850
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2022-02-10T19:15:09
- Last Modified Date
- 2022-02-17T17:26:27
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7012s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7012s:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7014s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7014s:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7010_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7010:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7015_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7015:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7020_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7020:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7030_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7030:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7035_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7035:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7045_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7045:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7100_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7100:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:xilinx_z-7007s_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:xilinx_z-7007s:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.8
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://support.xilinx.com/s/article/47915 | Vendor Advisory |
| https://support.xilinx.com/s/article/76964 | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-44850 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44850 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:32:25 | Added to TrackCVE | |||
| 2022-12-06 09:22:42 | 2022-02-10T19:15Z | 2022-02-10T19:15:09 | CVE Published Date | updated |
| 2022-12-06 09:22:42 | 2022-02-17T17:26:27 | CVE Modified Date | updated | |
| 2022-12-06 09:22:42 | Analyzed | Vulnerability Status | updated |