Medium severity · published Jun 14, 2021
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…
6.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PM
Poweredge Mx740c Firmware · Dell
before 2.9.4 · source: NVD
PM
Poweredge Mx840c Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R640 Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R740 Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R740xd Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R840 Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R940 Firmware · Dell
before 2.9.4 · source: NVD
PR
Poweredge R940xa Firmware · Dell
before 2.9.4 · source: NVD
P7
Precision 7920 Firmware · Dell
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21554
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21554
Patch
https://www.dell.com/support/kbdoc/000187958
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