SARA / Free Tools / CVE / CVE-2023-4299

CVE-2023-4299 — Digi RealPort Protocol is vulnerable to a replay attack that may allow an attack

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

CVSS

9.0 CRITICAL

EPSS

0.02% (top 95.80%)

CWE

CWE-836

Published

2023-08-31T20:45:43.866Z

Last modified

2025-01-16T21:30:37.810Z

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

01What is this vulnerability?

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

Vendor	Product	Versions
Digi International	Digi RealPort	0
Digi International	Digi RealPort	0
Digi International	Digi ConnectPort TS 8/16	0
Digi International	Digi Passport Console Server	all versions
Digi International	Digi ConnectPort LTS 8/16/32	0
Digi International	Digi CM Console Server	all versions
Digi International	Digi PortServer TS	all versions
Digi International	Digi PortServer TS MEI	all versions
Digi International	Digi PortServer TS MEI Hardened	all versions
Digi International	Digi PortServer TS M MEI	all versions
Digi International	Digi PortServer TS P MEI	all versions
Digi International	Digi One IAP Family	all versions
Digi International	Digi One IA	all versions
Digi International	Digi One SP IA	all versions
Digi International	Digi One SP	all versions
Digi International	Digi WR31	all versions
Digi International	Digi WR11 XT	all versions
Digi International	Digi WR44 R	all versions
Digi International	Digi WR21	all versions
Digi International	Digi Connect ES	0
Digi International	Digi Connect SP	all versions
Digi International	Digi 6350	SR — all versions
Digi International	Digi ConnectCore 8X products	all versions

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

www.cisa.gov — https://www.cisa.gov/news-events/ics-advisories/icsa-23-243-04
www.digi.com — https://www.digi.com/getattachment/resources/security/alerts/realport-cves/Drago…

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