CVE-2021-21556
Last modified
CVE-2021-21556 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a stack-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of Service, arbitrary code execution, or information disclosure in UEFI or BIOS Preboot Environment.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
Description
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a stack-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of Service, arbitrary code execution, or information disclosure in UEFI or BIOS Preboot Environment.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dell | Poweredge R640 Firmware | < 2.11.2 |
| Dell | Poweredge R740 Firmware | < 2.11.2 |
| Dell | Poweredge R740xd Firmware | < 2.11.2 |
| Dell | Poweredge R940 Firmware | < 2.11.2 |
| Dell | Poweredge R840 Firmware | < 2.11.2 |
| Dell | Poweredge R940xa Firmware | < 2.11.2 |
| Dell | Poweredge T640 Firmware | < 2.11.2 |
| Dell | Poweredge Mx740c Firmware | < 2.11.2 |
| Dell | Poweredge Mx840c Firmware | < 2.11.2 |
References
- https://www.dell.com/support/kbdoc/000187958Vendor Advisory
- https://www.dell.com/support/kbdoc/000187958Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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