CVE-2023-39945

HIGH

8.2

CVSS v3

Description

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.11.0, 2.10.2, 2.9.2, and 2.6.5, a data submessage sent to PDP port raises unhandled `BadParamException` in fastcdr, which in turn crashes fastdds. Versions 2.11.0, 2.10.2, 2.9.2, and 2.6.5 contain a patch for this issue.

CWE-248

How to fix

Remediation Available

fastddsDebian

Fixed in:2.1.0+ds-9+deb11u1CVE-2023-39945

Fixed in:2.9.1+ds-1+deb12u1CVE-2023-39945

Fixed in:2.10.1+ds-3CVE-2023-39945

fastddsUbuntu

Fixed in:2.5.0+ds-3ubuntu0.1~esm1USN-6306-1

Fixed in:2.9.1+ds-1ubuntu0.1USN-6306-1

fastdds-toolsUbuntu

Fixed in:2.5.0+ds-3ubuntu0.1~esm1USN-6306-1

Fixed in:2.9.1+ds-1ubuntu0.1USN-6306-1

libfastrtps2.5Ubuntu

Fixed in:2.5.0+ds-3ubuntu0.1~esm1USN-6306-1

libfastrtps2.9Ubuntu

Fixed in:2.9.1+ds-1ubuntu0.1USN-6306-1

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.81%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Third-Party Advisory4

Related Vulnerabilities

Other CWE-248 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-59538	High	7.5	8.3%	-	Fix
CVE-2021-37714	High	7.5	6.9%	-	Fix
CVE-2025-53366	Unscored	-	6.0%	-	-
CVE-2018-11466	Critical	9.8	4.0%	-	-
CVE-2025-59465	High	7.5	3.6%	-	Fix
CVE-2018-7852	High	7.5	3.6%	-	-

Common questions

How do I fix CVE-2023-39945?

Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-39945 being actively exploited?

Not that we know of. CVE-2023-39945 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.81% is the estimated probability that it will be exploited in the next 30 days. That is higher than 53% of all scored CVEs.

How severe is CVE-2023-39945?

CVE-2023-39945 has a CVSS v3 base score of 8.2, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-39945 affect?

Published advisories record a fix for fastdds (Debian), fastdds (Ubuntu), fastdds-tools (Ubuntu), libfastrtps2.5 (Ubuntu), and 1 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.