CVE-2019-19101

Incomplete communication encryption and validation in B&R Automation Studio upgrade service

MEDIUM

5.9

CVSS Score

Published: April 29, 2020 at 02:07 AM UTC

Updated: June 17, 2026 at 02:26 AM UTC

2 products affected across 2 vendorsAutomation StudioAutomation Studio

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Severity

MEDIUM5.9

Exploit prediction

EPSS 0.5%

Description

A missing secure communication definition and an incomplete TLS validation in the upgrade service in B&R Automation Studio versions 4.0.x, 4.1.x, 4.2.x, < 4.3.11SP, < 4.4.9SP, < 4.5.5SP, < 4.6.4 and < 4.7.2 enable unauthenticated users to perform MITM attacks via the B&R upgrade server.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Automation Studio · Br Automation

95%

4.0 ≤ v ≤ 4.0.29.874.1 ≤ v ≤ 4.1.17.1134.2 ≤ v ≤ 4.2.14.1194.3 ≤ v < 4.3.114.4 ≤ v < 4.4.94.5 ≤ v < 4.5.54.6 ≤ v < 4.6.44.7 ≤ v < 4.7.2

Affected range stops below 4.3.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.5.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.6.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.7.2, so it looks safe — our inference, not a vendor statement

Automation Studio · B and R

60%

v < 4.3.11SPv < 4.4.9SPv < 4.5.5SPv < 4.6.3SPv < 4.7.24.0.x 4.1.x 4.2.x

Affected range stops below 4.3.11SP, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.9SP, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.5.5SP, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.6.3SP, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.7.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.br-automation.com/en/downloads/032020-multiple-vulnerabilities-in-automation-studio/

References (1)

x_refsource_CONFIRMBroken LinkVendor Advisory

Source: [email protected]

https://www.br-automation.com/en/downloads/032020-multiple-vulnerabilities-in-automation-studio/

CVSS

5.9MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-326CWE-295

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