CVE-2020-4347Network attack vector

Privilege escalation via permissive WebSphere files

Published Apr 16, 2020 · Updated Sep 16, 2024

Privilege escalation in IBM InfoSphere Information Server 11.7 allows remote attackers to gain elevated access through WebSphere ND files. The affected installation assigns inappropriate permissions to the WebSphere Application Server Network Deployment java tree instead of restricting it to mode 755. Exposure requires an affected 11.7 installation or an earlier release upgraded to 11.7; a weak initial umask also makes WAS ND installations susceptible.

CVSS severity7.3
High
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in IBM InfoSphere Information Server 11.7 allows remote attackers to gain elevated access through WebSphere ND files. The affected installation assigns inappropriate permissions to the WebSphere Application Server Network Deployment java tree instead of restricting it to mode 755. Exposure requires an affected 11.7 installation or an earlier release upgraded to 11.7; a weak initial umask also makes WAS ND installations susceptible.

The record

CVE
CVE-2020-4347
Published
Apr 16, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
InfoSphere Information Server
Classifications
CWE-732, T1574.010
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.3
  2. Affected versionversion=11.5
  3. Affected versionversion=11.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · InfoSphere Information Serverversion=11.3; version=11.5; version=11.7

Published CVSS scores

7.3IBMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1574.010Services File Permissions Weakness

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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