What is the CVSS score of CVE-2017-4905?

CVE-2017-4905 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 3.4%.

Is there a public PoC exploit available for CVE-2017-4905?

Yes, a public proof-of-concept exploit is available for CVE-2017-4905. Prioritise patching immediately. EPSS: 3.4%.

Is there a patch available for CVE-2017-4905?

Yes, a patch is available for CVE-2017-4905. Update the affected software to the latest version immediately.

ESXi CVE-2017-4905

MEDIUM

Use of Uninitialized Resource (CWE-908)

2017-06-07 security@vmware.com

Information Disclosure VMware ESXi Fusion Workstation Player Workstation Pro Fusion Pro

5.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-908 ASVS 5.0 V15 - Secure Coding and Architecture Variable initialization
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 3.44%.
Exploit ScenarioDerived	A local attacker with access to the system could access uninitialized memory causing crashes or information disclosure.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 3.4% exploitation probability (EPSS)

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AnalysisAI

VMware ESXi 6.5 without patch ESXi650-201703410-SG, 6.0 U3 without patch ESXi600-201703401-SG, 6.0 U2 without patch ESXi600-201703403-SG, 6.0 U1 without patch ESXi600-201703402-SG, 5.5 without patch. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Initialize all variables, use compiler warnings for uninitialized access, use memory-safe languages.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Use of Uninitialized Resource (CWE-908), which allows attackers to access uninitialized memory causing crashes or information disclosure. VMware ESXi 6.5 without patch ESXi650-201703410-SG, 6.0 U3 without patch ESXi600-201703401-SG, 6.0 U2 without patch ESXi600-201703403-SG, 6.0 U1 without patch ESXi600-201703402-SG, 5.5 without patch ESXi550-201703401-SG; Workstation Pro / Player 12.x prior to 12.5.5; and Fusion Pro / Fusion 8.x prior to 8.5.6 have uninitialized memory usage. This issue may lead to an information leak. Affected products include: Vmware Fusion, Vmware Fusion Pro, Vmware Workstation Player, Vmware Workstation Pro, Vmware Esxi. Version information: prior to 12.5.5.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

VMware ESXi 6.5 without patch ESXi650-201703410-SG, 6.0 U3 without patch ESXi600-201703401-SG, 6.0 U2 without patch ESXi600-201703403-SG, 6.0 U1 without patch ESXi600-201703402-SG, 5.5 without patch ESXi550-201703401-SG; Workstation Pro / Player 12.x prior to 12.5.5; and Fusion Pro / Fusion 8.x prior to 8.5.6 have uninitialized memory usage. This issue may lead to an information leak.

Threat Intelligence Overview

EPSS Score

3.4%

Top 12% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

Exploit-DB

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 MEDIUM

CISA KEV No

Public POC Yes

EPSS 3.4%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +3

CVSS: +28

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:vmware:fusion:*:*:*:*:*:*:*:*

cpe:2.3:a:vmware:fusion_pro:*:*:*:*:*:*:*:*

cpe:2.3:a:vmware:workstation_player:*:*:*:*:*:*:*:*

cpe:2.3:a:vmware:workstation_pro:*:*:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:5.5:-:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:5.5:1:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:5.5:2:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:5.5:3a:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:5.5:3b:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:-:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:1:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:1a:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:1b:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:2:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:3:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.0:3a:*:*:*:*:*:*

cpe:2.3:o:vmware:esxi:6.5:-:*:*:*:*:*:*

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References

Advisories & patches

PATCH http://www.vmware.com/security/advisories/VMSA-2017-0006.html REF http://www.securityfocus.com/bid/97164 REF http://www.securitytracker.com/id/1038148 REF http://www.securitytracker.com/id/1038149

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GitHub PoC

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