CVE-2023-50257: Eprosima Fast Dds broken access control (CVSS 9.6)

Description

eProsima Fast DDS (formerly Fast RTPS) is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Even with the application of SROS2, due to the issue where the data (`p[UD]`) and `guid` values used to disconnect between nodes are not encrypted, a vulnerability has been discovered where a malicious attacker can forcibly disconnect a Subscriber and can deny a Subscriber attempting to connect. Afterwards, if the attacker sends the packet for disconnecting, which is data (`p[UD]`), to the Global Data Space (`239.255.0.1:7400`) using the said Publisher ID, all the Subscribers (Listeners) connected to the Publisher (Talker) will not receive any data and their connection will be disconnected. Moreover, if this disconnection packet is sent continuously, the Subscribers (Listeners) trying to connect will not be able to do so. Since the initial commit of the `SecurityManager.cpp` code (`init`, `on_process_handshake`) on Nov 8, 2016, the Disconnect Vulnerability in RTPS Packets Used by SROS2 has been present prior to versions 2.13.0, 2.12.2, 2.11.3, 2.10.3, and 2.6.7.

CVSS 3.1 breakdown

Attack vectorAdjacent

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Eprosima Fast Dds≥ 2.10.0 < 2.10.3 · ≥ 2.11.0 < 2.11.3 · ≥ 2.12.0 < 2.12.2 · < 2.6.7

Remediation

Fixed in

Eprosima Fast Dds≥ 2.10.3

Patch & vendor advisories

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2023-50257 being actively exploited?

CVE-2023-50257 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.48%.

How severe is CVE-2023-50257?

CVE-2023-50257 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2023-50257?

Affected products include Eprosima Fast Dds.

How do I fix CVE-2023-50257?

Upgrade affected software to a fixed version, for example Eprosima Fast Dds 2.10.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-50257 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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