CVE-2023-39949 — eprosima Fast DDS is a C++ implementation of the Data Distribution Service stand

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.9.1 and 2.6.5, improper validation of sequence numbers may lead to remotely reachable assertion failure. This can remotely crash any Fast-DDS pr

01What is this vulnerability?

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.9.1 and 2.6.5, improper validation of sequence numbers may lead to remotely reachable assertion failure. This can remotely crash any Fast-DDS process. Versions 2.9.1 and 2.6.5 contain a patch for this issue.

02Affected products

Vendor	Product	Versions
eProsima	Fast	DDS — >= 2.7.0, < 2.9.1, < 2.6.5

03Active exploitation status

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

04Recommended remediation

• 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.

05Technical details

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

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

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

08Timeline

• Published: 2023-08-11T13:55:14.350Z
• Last modified: 2025-02-13T17:03:18.750Z

09References

• github.com — https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cg
• github.com — https://github.com/eProsima/Fast-DDS/issues/3236
• github.com — https://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageRe…
• www.debian.org — https://www.debian.org/security/2023/dsa-5481