CVE-2021-21556

CVSS V2 High 7.2 CVSS V3 Medium 6.7
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.
Overview
  • CVE ID
  • CVE-2021-21556
  • Assigner
  • security_alert@emc.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-14T19:15:08
  • Last Modified Date
  • 2021-06-23T18:03:50
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:dell:poweredge_r640_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r640:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_r740_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r740:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_r740xd_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r740xd:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_r940_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r940:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_r840_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r840:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_r940xa_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_r940xa:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_t640_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_t640:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_mx740c_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_mx740c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:dell:poweredge_mx840c_firmware:*:*:*:*:*:*:*:* 1 OR 2.11.2
cpe:2.3:h:dell:poweredge_mx840c:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.2
  • Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 6.7
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.dell.com/support/kbdoc/000187958 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-21556
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21556
History
Created Old Value New Value Data Type Notes
2022-05-10 07:10:11 Added to TrackCVE
2022-12-05 04:24:34 secure@dell.com security_alert@emc.com CVE Assigner updated
2022-12-05 04:24:34 2021-06-14T19:15Z 2021-06-14T19:15:08 CVE Published Date updated
2022-12-05 04:24:34 2021-06-23T18:03:50 CVE Modified Date updated
2022-12-05 04:24:34 Analyzed Vulnerability Status updated