What is the CVSS score of CVE-2021-29873?

CVE-2021-29873 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 1.5%.

Is there a patch available for CVE-2021-29873?

Yes, a patch is available for CVE-2021-29873. Update the affected software to the latest version immediately.

San Volume Controller Firmware CVE-2021-29873

HIGH

2021-10-21 psirt@us.ibm.com

Denial Of Service IBM San Volume Controller Firmware Storwize V7000 Software Storwize V3700 Software Storwize V3500 Software Storwize V5000 Software Spectrum Virtualize Spectrum Virtualize For Public Cloud Storwize V5100 Software Flashsystem 9100 Firmware Flashsystem 9000 Firmware

8.1

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	CVSS score of 8.1 (HIGH). Attack characteristics: network attack vector, low complexity, low 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).

Patch available 1.5% exploitation probability (EPSS)

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AnalysisAI

IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted shell escape vulnerability. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. 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.

Technical ContextAI · show details

IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted shell escape vulnerability. IBM X-Force ID: 206229. Affected products include: Ibm Spectrum Virtualize, Ibm Spectrum Virtualize For Public Cloud, Ibm Storwize V3500 Software, Ibm Storwize V3700 Software, Ibm Storwize V5000 Software.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.1 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

DescriptionNVD

IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted shell escape vulnerability. IBM X-Force ID: 206229.

Threat Intelligence Overview

EPSS Score

1.5%

Top 29% 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 1.5%

Patch available Yes

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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +40

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:ibm:spectrum_virtualize:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:spectrum_virtualize_for_public_cloud:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:storwize_v3500_software:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:storwize_v3700_software:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:storwize_v5000_software:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:storwize_v5100_software:*:*:*:*:*:*:*:*

cpe:2.3:a:ibm:storwize_v7000_software:*:*:*:*:*:*:*:*

cpe:2.3:o:ibm:san_volume_controller_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:ibm:flashsystem_9100_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:ibm:flashsystem_9000_firmware:*:*:*:*:*:*:*:*

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