title: Digi RealPort Protocol Use of Password Hash Instead of Password for Authentication
description:
Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.
problem types: CWE-836
affected:
{
defaultStatus: unaffected
platforms: Windows
product: Digi RealPort
vendor: Digi International
versions:
lessThanOrEqual: 4.8.488.0, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
platforms: Linux
product: Digi RealPort
vendor: Digi International
versions:
lessThanOrEqual: 1.9-40, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Digi ConnectPort TS 8/16
vendor: Digi International
versions:
lessThan: 2.26.2.4, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Digi Passport Console Server
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi ConnectPort LTS 8/16/32
vendor: Digi International
versions:
lessThan: 1.4.9, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Digi CM Console Server
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi PortServer TS
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi PortServer TS MEI
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi PortServer TS MEI Hardened
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi PortServer TS M MEI
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi PortServer TS P MEI
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi One IAP Family
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi One IA
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi One SP IA
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: ​Digi One SP
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi WR31
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi WR11 XT
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi WR44 R
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi WR21
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi Connect ES
vendor: Digi International
versions:
lessThan: 2.26.2.4, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Digi Connect SP
vendor: Digi International
versions:
status: affected, version: all versions
}
{
defaultStatus: unaffected
product: Digi 6350-SR
vendor: Digi International
versions:
status: unaffected, version: all versions
}
{
defaultStatus: unaffected
product: Digi ConnectCore 8X products
vendor: Digi International
versions:
status: unaffected, version: all versions
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions:
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.
workarounds:
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.