CVE-2023-39949 json
Improper validation of sequence numbers leading to remotely reachable assertion failure
published 2023-08-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43647
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- eprosima fast_dds 2.6.5
- fastdds Debian 12 2.9.1+ds-1+deb12u1
- fastdds Debian 13 2.10.1+ds-2
debian advisories DEBIAN-CVE-2023-39949
- fastdds Ubuntu Pro 22.04 LTS 2.5.0+ds-3ubuntu0.1~esm1
ubuntu advisories UBUNTU-CVE-2023-39949
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- eProsima Fast-DDS
Classification
- Weakness
-
- CWE-617 Reachable Assertion
References
-
github.com
/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cg
third-party-advisory
-
github.com
/eProsima/Fast-DDS/issues/3236
third-party-advisory
-
github.com
/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059
third-party-advisory
-
debian.org
/security/2023/dsa-5481
third-party-advisory
Sources
- CVE List CVE-2023-39949
- NVD CVE-2023-39949
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.