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Alienware M15 R6 Firmware CVE-2021-21573

HIGH
Stack-based Buffer Overflow (CWE-121)
2021-06-24 security_alert@emc.com
RCE Buffer Overflow Stack Overflow Dell Alienware M15 R6 Firmware Latitude 5310 Firmware Latitude 5310 2 In 1 Firmware Latitude 5320 Firmware Latitude 5410 Firmware Latitude 5411 Firmware Latitude 5420 Firmware Latitude 5421 Firmware Latitude 5510 Firmware Latitude 5511 Firmware Latitude 5520 Firmware Latitude 5521 Firmware Chengming 3990 Firmware Chengming 3991 Firmware Inspiron 14 5418 Firmware Latitude 7210 2 In 1 Firmware Latitude 7310 Firmware Latitude 7320 Firmware Latitude 7320 Detachable Firmware Latitude 7410 Firmware Latitude 7420 Firmware Latitude 7520 Firmware Latitude 9410 Firmware Latitude 9420 Firmware Latitude 9520 Firmware Precision 3640 Firmware Precision 5550 Firmware Precision 5560 Firmware Precision 5760 Firmware Precision 7550 Firmware Precision 7560 Firmware Precision 7750 Firmware Precision 7760 Firmware Inspiron 15 5518 Firmware Inspiron 15 7510 Firmware Inspiron 3501 Firmware Inspiron 3880 Firmware Inspiron 3881 Firmware Inspiron 3891 Firmware Inspiron 5301 Firmware Inspiron 5401 Firmware Inspiron 5401 Aio Firmware Inspiron 5402 Firmware Inspiron 5409 Firmware Inspiron 5502 Firmware Optiplex 3080 Firmware Optiplex 3280 All In One Firmware Optiplex 5080 Firmware Optiplex 5090 Tower Firmware Optiplex 7080 Firmware Optiplex 7090 Tower Firmware Optiplex 7480 All In One Firmware Optiplex 7490 All In One Firmware Vostro 14 5410 Firmware Vostro 15 5510 Firmware Vostro 15 7510 Firmware Vostro 3400 Firmware Vostro 3500 Firmware Vostro 3501 Firmware Vostro 3681 Firmware Vostro 3690 Firmware Vostro 3881 Firmware Vostro 3888 Firmware Vostro 3890 Firmware Vostro 5301 Firmware Latitude 3320 Firmware Latitude 3410 Firmware Latitude 3420 Firmware Latitude 3510 Firmware Latitude 3520 Firmware Optiplex 7780 All In One Firmware Latitude 3120 Firmware Inspiron 7706 2 In 1 Firmware Inspiron 7501 Firmware Inspiron 7500 Firmware Inspiron 7400 Firmware Inspiron 7306 2 In 1 Firmware Inspiron 7300 Firmware Inspiron 5509 Firmware Vostro 7500 Firmware Vostro 5890 Firmware Vostro 5880 Firmware Vostro 5502 Firmware Vostro 5402 Firmware Precision 3440 Firmware Precision 3450 Firmware Precision 3550 Firmware Precision 3551 Firmware Precision 3560 Firmware Precision 3561 Firmware Xps 13 9310 Firmware Xps 15 9500 Firmware Xps 15 9510 Firmware Xps 17 9700 Firmware Xps 17 9710 Firmware G15 5510 Firmware G15 5511 Firmware Xps 13 9305 Firmware Inspiron 5300 Firmware Inspiron 7300 2 In 1 Firmware Inspiron 7500 2 In 1 Firmware Latitude 9510 Firmware Vostro 5300 Firmware G3 3500 Firmware G5 5500 Firmware G7 7500 Firmware G7 7700 Firmware Inspiron 5310 Firmware Inspiron 5400 2 In 1 Firmware Inspiron 5400 Aio Firmware Inspiron 5406 2N1 Firmware Inspiron 5408 Firmware Inspiron 5410 2 In 1 Firmware Inspiron 5501 Firmware Inspiron 5508 Firmware Inspiron 7506 Firmware Inspiron 7610 Firmware Inspiron 7700 Aio Firmware Latitude 5320 2 In 1 Firmware Optiplex 3090 Uff Firmware Optiplex 5490 Aio Firmware Optiplex 7090 Uff Firmware Precision 17 M5750 Firmware Precision 3650 Mt Firmware Vostro 5310 Firmware Vostro 5401 Firmware Vostro 5501 Firmware Xps 13 2In1 9310 Firmware
7.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-121
ASVS 5.0
V15 - Secure Coding and Architecture Stack buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 7.5 (HIGH). Attack characteristics: local attack vector, high complexity, high privileges required, no user interaction not required.
Exploit ScenarioDerived

Successful exploitation could compromise the high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

Dell BIOSConnect feature contains a buffer overflow vulnerability. Rated high severity (CVSS 7.5). No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

This vulnerability is classified under CWE-121. Dell BIOSConnect feature contains a buffer overflow vulnerability. An authenticated malicious admin user with local access to the system may potentially exploit this vulnerability to run arbitrary code and bypass UEFI restrictions. Affected products include: Dell Alienware M15 R6 Firmware, Dell Chengming 3990 Firmware, Dell Chengming 3991 Firmware, Dell G15 5510 Firmware, Dell G15 5511 Firmware.

Severity by source

NVD PRIMARY 7.5 HIGH
AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Dell BIOSConnect feature contains a buffer overflow vulnerability. An authenticated malicious admin user with local access to the system may potentially exploit this vulnerability to run arbitrary code and bypass UEFI restrictions.

Threat Intelligence Overview

EPSS Score
0.3%
Top 80% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Stack-based Buffer Overflow HIGH

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:dell:alienware_m15_r6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:chengming_3990_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:chengming_3991_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g15_5510_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g15_5511_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g3_3500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g5_5500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g7_7500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g7_7700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_14_5418_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_15_5518_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_15_7510_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3501_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3880_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3881_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3891_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5301_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5310_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5400_2-in-1_firmware:*:*:*:*:*:*:*:*
+ 108 more

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Same weakness CWE-121 – Stack-based Buffer Overflow

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References

Advisories & patches
ADVISORY https://www.dell.com/support/kbdoc/en-us/000188682

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