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Emc Isilon Onefs CVE-2020-5318

HIGH
Improper Authorization (CWE-285)
2020-02-06 security_alert@emc.com
Authentication Bypass Dell Emc Isilon Onefs
7.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-285
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

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: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. 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 1.1% exploitation probability (EPSS)

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AnalysisAI

Dell EMC Isilon OneFS versions 8.1.2, 8.1.0.4, 8.1.0.3, and 8.0.0.7 contain a vulnerability in some configurations. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. 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

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Technical ContextAI · show details

This vulnerability is classified under CWE-285. Dell EMC Isilon OneFS versions 8.1.2, 8.1.0.4, 8.1.0.3, and 8.0.0.7 contain a vulnerability in some configurations. An attacker may exploit this vulnerability to gain access to restricted files. The non-RAN HTTP and WebDAV file-serving components have a vulnerability wherein when either are enabled, and Basic Authentication is enabled for either or both components, files are accessible without authentication. Affected products include: Dell Emc Isilon Onefs.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionNVD

Dell EMC Isilon OneFS versions 8.1.2, 8.1.0.4, 8.1.0.3, and 8.0.0.7 contain a vulnerability in some configurations. An attacker may exploit this vulnerability to gain access to restricted files. The non-RAN HTTP and WebDAV file-serving components have a vulnerability wherein when either are enabled, and Basic Authentication is enabled for either or both components, files are accessible without authentication.

Threat Intelligence Overview

EPSS Score
1.1%
Top 37% 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 1.1%
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
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:dell:emc_isilon_onefs:8.0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.2:*:*:*:*:*:*:*

More in Emc Isilon Onefs

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CVE-2018-1213 HIGH POC
8.8 Mar 26

Dell EMC Isilon OneFS versions between 8.1.0.0 - 8.1.0.1, 8.0.1.0 - 8.0.1.2, and 8.0.0.0 - 8.0.0.6, versions 7.2.1.x, an
CVE-2018-1204 MEDIUM POC
6.7 Mar 26

Dell EMC Isilon OneFS versions between 8.1.0.0 - 8.1.0.1, 8.0.1.0 - 8.0.1.2, and 8.0.0.0 - 8.0.0.6, versions 7.2.1.x, an
CVE-2018-1203 MEDIUM POC
6.7 Mar 26

In Dell EMC Isilon OneFS, the compadmin is able to run tcpdump binary with root privileges. Rated medium severity (CVSS

CVE-2020-5328 CRITICAL
9.8 Mar 06

Dell EMC Isilon OneFS versions prior to 8.2.0 contain an unauthorized access vulnerability due to a lack of thorough aut
CVE-2020-5369 HIGH
8.8 Sep 02

Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 contain a privilege escalat
CVE-2020-5371 HIGH
8.8 Jul 06

Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale version 9.0.0 contain a file permissions vulner
CVE-2020-5365 HIGH
7.5 May 20

Dell EMC Isilon versions 8.2.2 and earlier contain a remotesupport vulnerability. Rated high severity (CVSS 7.5), this v
CVE-2020-5364 HIGH
7.5 May 20

Dell EMC Isilon OneFS versions 8.2.2 and earlier contain an SNMPv2 vulnerability. Rated high severity (CVSS 7.5), this v
CVE-2020-5347 HIGH
7.5 Apr 04

Dell EMC Isilon OneFS versions 8.2.2 and earlier contain a denial of service vulnerability. Rated high severity (CVSS 7.

Same weakness CWE-285 – Improper Authorization

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CVE-2016-3352 HIGH
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CVE-2022-2595 CRITICAL POC
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Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC
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CVE-2023-22515 CRITICAL POC
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CVE-2012-4681 CRITICAL POC
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CVE-2013-2465 CRITICAL POC
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CVE-2011-3544 CRITICAL POC
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CVE-2022-40684 CRITICAL POC
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CVE-2025-61882 CRITICAL POC
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CVE-2024-0012 CRITICAL POC
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References

Advisories & patches
ADVISORY https://www.dell.com/support/security/en-us/details/540708/DSA-2020-018-Dell-EMC-Isilon-OneFS-Security-Update-for-Improper-Authorization-Vulnerability

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