CVE-2023-4299

Digi RealPort Protocol Use of Password Hash Instead of Password for Authentication

Published Aug 31, 2023 CVSS 3.1 · 9 Critical EPSS < 1% KEV · Not listed
Description

Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

Remediation

Vendor Solution

Digi International recommends users acquire and install patches that they have made available for the following products: * ​RealPort software for Windows: Fixed in 4.10.490 * ​Digi ConnectPort TS 8/16: Fixed in firmware version 2.26.2.4 * ​Digi ConnectPort LTS 8/16/32: Fixed in version 1.4.9 * ​Digi Connect ES: Fixed in firmware version 2.26.2.4 ​For more information, see the customer notification document https://www.digi.com/getattachment/resources/security/alerts/realport-cves/Dragos-Disclosure-Statement.pdf  published by Digi International.


Vendor Workaround

Dragos recommends restricting access to Digi devices on TCP/771 (default) or TCP/1027 (if encryption is enabled, this is the default port). Only allow the workstations which initiate RealPort connections to communicate to the field equipment on those ports. Note that most of Digi's devices allow you to change the setting for which TCP port the RealPort service runs on, so end users should consult their device configuration and restrict access to the configured port if it is not the default. ​If using the system in 'reverse' mode, where the Digi device calls back to the Windows or Linux workstation, then Dragos recommends restricting access to the workstation on TCP/771 or TCP/1027 to known Digi RealPort devices on your network. This port may be configured by end users, so consult the workstation and device configurations to ensure coverage.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-54170 Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Jan 16, 2025, 9:30 PM
Reserved
Aug 10, 2023, 8:14 PM
Status
Modified
Published
Aug 31, 2023, 9:15 PM
Modified
Jun 17, 2026, 6:37 AM