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CVE-2021-21554

MEDIUMCVSS 6.7/10EPSS 0.34%

Last modified

CVE-2021-21554 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and, Dell Precision 7920 Rack Workstation BIOS contain a stack-based buffer overflow vulnerability in systems with Intel Optane DC Persistent Memory 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 0.34% chance of exploitation in the next 30 days.

Description

Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and, Dell Precision 7920 Rack Workstation BIOS contain a stack-based buffer overflow vulnerability in systems with Intel Optane DC Persistent Memory 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
6.7/10

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

EPSS Probability
0.34%

25.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DellPoweredge R640 Firmware< 2.9.4
DellPoweredge R740 Firmware< 2.9.4
DellPoweredge R740xd Firmware< 2.9.4
DellPoweredge R940 Firmware< 2.9.4
DellPoweredge R840 Firmware< 2.9.4
DellPoweredge R940xa Firmware< 2.9.4
DellPoweredge Mx740c Firmware< 2.9.4
DellPoweredge Mx840c Firmware< 2.9.4
DellPrecision 7920 FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21554?
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and, Dell Precision 7920 Rack Workstation BIOS contain a stack-based buffer overflow vulnerability in systems with Intel Optane DC Persistent Memory 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.
How severe is CVE-2021-21554?
CVE-2021-21554 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21554?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21554?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST