Is CVE-2018-4839 in the CISA KEV catalog?

No. CVE-2018-4839 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-4839?

CVE-2018-4839 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2018-4839?

CVE-2018-4839 has an EPSS score of 0.58% (44th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-4839?

Upgrade digsi 4 to 4.92 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2018-4839

MEDIUM

5.3

CVSS v3

NVD

Description

A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions), Other SIPROTEC 4 relays (All versions), Other SIPROTEC Compact relays (All versions), SIPROTEC 4 7SD80 (All versions < V4.70), SIPROTEC 4 7SJ61 (All versions < V4.96), SIPROTEC 4 7SJ62 (All versions < V4.96), SIPROTEC 4 7SJ64 (All versions < V4.96), SIPROTEC 4 7SJ66 (All versions < V4.30), SIPROTEC Compact 7SJ80 (All versions < V4.77), SIPROTEC Compact 7SK80 (All versions < V4.77). An attacker with local access to the engineering system or in a privileged network position and able to obtain certain network traffic could possibly reconstruct access authorization passwords.

CWE-326

How to fix

Remediation Available

digsi 4NVD

Affected:< 4.92Fixed in:4.92CVE-2018-4839derived from NVD

en100 ethernet module iec 61850 firmwareNVD

Affected:< 4.30Fixed in:4.30CVE-2018-4839derived from NVD

siprotec 4 7sj66 firmwareNVD

Affected:< 4.30Fixed in:4.30CVE-2018-4839derived from NVD

siprotec compact 7sj80 firmwareNVD

Affected:< 4.77Fixed in:4.77CVE-2018-4839derived from NVD

siprotec compact 7sk80 firmwareNVD

Affected:< 4.77Fixed in:4.77CVE-2018-4839derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.58%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Patch1

cert-portal.siemens.com

Third-Party Advisory1

ics-cert.us-cert.gov

Related Vulnerabilities

Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0224	High	7.4	95%	-	Fix
CVE-2017-1000486	Critical	9.8	94%	KEV	Fix
CVE-2013-2566	Medium	5.9	84%	-	Fix
CVE-2017-11317	Critical	9.8	83%	KEV	-
CVE-2018-18325	High	7.5	74%	KEV	-
CVE-2018-15811	High	7.5	74%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.