CVE-2021-21557: Input Validation
First published: Mon Jun 14 2021(Updated: )
Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. 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 System Management Mode.
Credit: security_alert@emc.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dell PowerEdge R640 Firmware | <2.11.2 | |
| Dell PowerEdge R640 Firmware | ||
| Dell PowerEdge R740 Firmware | <2.11.2 | |
| Dell PowerEdge R740 Firmware | ||
| Dell PowerEdge R740xd Firmware | <2.11.2 | |
| Dell PowerEdge R740xd2 | ||
| Dell PowerEdge r940 firmware | <2.11.2 | |
| Dell PowerEdge R940xa Firmware | ||
| Dell PowerEdge R540 Firmware | <2.11.2 | |
| Dell PowerEdge R540 Firmware | ||
| Dell PowerEdge r440 firmware | <2.11.2 | |
| Dell PowerEdge R440 | ||
| Dell PowerEdge T440 Firmware | <2.11.2 | |
| Dell PowerEdge T440 Firmware | ||
| Dell PowerEdge XR2 Firmware | <2.11.2 | |
| Dell PowerEdge XR2 Firmware | ||
| Dell PowerEdge R740xd2 Firmware | <2.11.2 | |
| Dell PowerEdge R740xd2 | ||
| Dell PowerEdge R840 Firmware | <2.11.2 | |
| Dell PowerEdge R840 Firmware | ||
| Dell PowerEdge R940xa | <2.11.2 | |
| Dell PowerEdge R940xa | ||
| Dell PowerEdge T640 Firmware | <2.11.2 | |
| Dell PowerEdge T640 | ||
| Dell PowerEdge c6420 firmware | <2.11.2 | |
| Dell PowerEdge C6420 | ||
| Dell PowerEdge FC640 | <2.11.2 | |
| Dell PowerEdge FC640 | ||
| Dell PowerEdge m640p Firmware | <2.11.2 | |
| Dell PowerEdge m640 Firmware | ||
| Dell PowerEdge m640p Firmware | <2.11.2 | |
| Dell PowerEdge m640p | ||
| Dell PowerEdge MX740c firmware | <2.11.2 | |
| Dell PowerEdge MX740c | ||
| Dell PowerEdge mx840c firmware | <2.11.2 | |
| Dell PowerEdge MX840c | ||
| Dell PowerEdge c4140 firmware | <2.11.2 | |
| Dell PowerEdge c4140 | ||
| Dell PowerEdge T140 Firmware | <2.5.1 | |
| Dell PowerEdge T140 Firmware | ||
| Dell T340 Firmware | <2.5.1 | |
| Dell PowerEdge T340 Firmware | ||
| Dell PowerEdge R240 Firmware | <2.5.1 | |
| Dell PowerEdge R240 Firmware | ||
| Dell PowerEdge R340 Firmware | <2.5.1 | |
| Dell PowerEdge R340 Firmware | ||
| Dell PowerEdge r6415 firmware | <1.16.1 | |
| Dell PowerEdge R6415 | ||
| Dell PowerEdge r7415 firmware | <1.16.1 | |
| Dell PowerEdge r7415 firmware | ||
| Dell PowerEdge r7425 firmware | <1.16.1 | |
| Dell PowerEdge r7425 firmware | ||
| Dell PowerEdge r6515 firmware | <2.2.4 | |
| Dell PowerEdge r6515 firmware | ||
| Dell PowerEdge r7515 firmware | <2.2.4 | |
| Dell PowerEdge r7515 | ||
| Dell PowerEdge r6525 firmware | <2.2.5 | |
| Dell PowerEdge r6525 firmware | ||
| Dell PowerEdge r7525 firmware | <2.2.5 | |
| Dell PowerEdge r7525 firmware | ||
| Dell PowerEdge c6525 | <2.2.4 | |
| Dell PowerEdge c6525 firmware |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-21557.
What is the severity of CVE-2021-21557?
The severity of CVE-2021-21557 is high.
What is affected by CVE-2021-21557?
Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS versions up to 2.11.2 are affected.
What can a local malicious user do with CVE-2021-21557?
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 System Management (SysMa).
How can I fix CVE-2021-21557?
To fix CVE-2021-21557, Dell recommends updating to the latest BIOS version for the affected systems. Please refer to Dell's support website for specific instructions.
- agent/type
- agent/severity
- agent/author
- agent/weakness
- agent/remedy
- agent/references
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/dell
- canonical/dell poweredge r640 firmware
- canonical/dell poweredge r740 firmware
- canonical/dell poweredge r740xd firmware
- canonical/dell poweredge r740xd2
- canonical/dell poweredge r940 firmware
- canonical/dell poweredge r940xa firmware
- canonical/dell poweredge r540 firmware
- canonical/dell poweredge r440 firmware
- canonical/dell poweredge r440
- canonical/dell poweredge t440 firmware
- canonical/dell poweredge xr2 firmware
- canonical/dell poweredge r740xd2 firmware
- canonical/dell poweredge r840 firmware
- canonical/dell poweredge r940xa
- canonical/dell poweredge t640 firmware
- canonical/dell poweredge t640
- canonical/dell poweredge c6420 firmware
- canonical/dell poweredge c6420
- canonical/dell poweredge fc640
- canonical/dell poweredge m640p firmware
- canonical/dell poweredge m640 firmware
- canonical/dell poweredge m640p
- canonical/dell poweredge mx740c firmware
- canonical/dell poweredge mx740c
- canonical/dell poweredge mx840c firmware
- canonical/dell poweredge mx840c
- canonical/dell poweredge c4140 firmware
- canonical/dell poweredge c4140
- canonical/dell poweredge t140 firmware
- canonical/dell t340 firmware
- canonical/dell poweredge t340 firmware
- canonical/dell poweredge r240 firmware
- canonical/dell poweredge r340 firmware
- canonical/dell poweredge r6415 firmware
- canonical/dell poweredge r6415
- canonical/dell poweredge r7415 firmware
- canonical/dell poweredge r7425 firmware
- canonical/dell poweredge r6515 firmware
- canonical/dell poweredge r7515 firmware
- canonical/dell poweredge r7515
- canonical/dell poweredge r6525 firmware
- canonical/dell poweredge r7525 firmware
- canonical/dell poweredge c6525
- canonical/dell poweredge c6525 firmware