HOMEVULNERABILITIESCVE-2023-39949
HIGH

CVE-2023-39949

CWE-617Published: August 11, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-39949 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
eprosima1 product(s)
fast dds
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059
ADVISORYhttps://github.com/eProsima/Fast-DDS/issues/3236
ADVISORYhttps://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cg
ADVISORYhttps://www.debian.org/security/2023/dsa-5481
ADVISORYhttps://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059
ADVISORYhttps://github.com/eProsima/Fast-DDS/issues/3236
ADVISORYhttps://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cg
ADVISORYhttps://www.debian.org/security/2023/dsa-5481

All References (8)

→
https://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059Third Party Advisory
→
https://github.com/eProsima/Fast-DDS/issues/3236Third Party Advisory
→
https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cgThird Party Advisory
→
https://www.debian.org/security/2023/dsa-5481Third Party Advisory
→
https://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059Third Party Advisory
→
https://github.com/eProsima/Fast-DDS/issues/3236Third Party Advisory
→
https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cgThird Party Advisory
→
https://www.debian.org/security/2023/dsa-5481Third Party Advisory

Quick Facts

CVE IDCVE-2023-39949
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-617
CISA KEVNo
Affected2 vendor(s)
PublishedAug 11, 2023

Related CVEs (CWE-617)

CVE-2020-3615
9.8
CVE-2019-9795
9.8
CVE-2020-6623
8.8
CVE-2020-6617
8.8
CVE-2020-6619
8.8
CVE-2020-12417
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-39949 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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