13 July 2021
KLCERT-20-025: Rockwell Automation ISaGRAF Runtime: Information Disclosure due to Hard-coded Cryptographic Key
Vendor
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CVE
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KLCERT
KLCERT-20-025
Timeline
Timeline
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Kaspersky ICS CERT advisory published
13 July 2021
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Vendor advisory published
08 June 2021
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Vendor confirmation
11 March 2020
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Vulnerability reported
21 February 2020
Description
ISaGRAF Runtime and ISaGRAF Workbench use Tiny Encryption Algorithm (TEA) algorithm with fixed keys to encrypt transmitted passwords over IXL protocol.
CVSS v3
Exploitability
⚠ Remotely exploitable: network access to port 1131/TCP is required
Attack complexity
Privilege required
User interaction
Confidentiality
Impact
A remote attacker is able to decrypt passwords captured during Man-in-the-Middle attack.
Affected products
- AADvance Controller:
- All firmware versions
- Based on ISaGRAF Runtime 5 controllers:
- All software versions
- ISaGRAF Free Runtime:
- All software versions
Mitigation
Rockwell Automation mitigation
To reduce risk, customers should ensure they are employing proper network segmentation and security controls. Specifically, network exposure for all control system devices should be minimized, and control systems should be behind firewalls and isolated from other networks when possible. Refer to the Converged Plantwide Ethernet (CPwE) Design and Implementation Guide for best practices deploying network segmentation and broader defense-in-depth strategies.
Customers should consider using proper network infrastructure controls, such as firewalls, UTM devices, VPN, or other security appliance.
For ISaGRAF, restrict or block traffic on TCP 1131 from outside of the industrial control system network zone. For more information on the TCP/UDP ports used by ISaGRAF refer to product documentation.
Since ISaGRAF 5 Runtime is provided to a customer as a development kit, implementing least-privilege may vary from implementation to implementation based on the hardware in use.
For AADvance controllers, customers are encouraged to restrict or block traffic on TCP 1132 from outside of the industrial control system network zone.1
Kaspersky publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.
