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CVE-2023-39949— Improper validation of sequence numbers leading to remotely reachable assertion failure

Quick assessment

Affected
eProsima Fast-DDS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

eProsima Fast DDS是eProsima公司的OMG（对象管理组）DDS（数据分发服务）标准的 C++ 实现。 eProsima Fast DDS 2.9.1之前版本存在安全漏洞，该漏洞源于序列号验证不当可能会导致远程可达断言失败，从而导致Fast-DDS 进程崩溃。

CVSS 7.5 · High EPSS 1.04% · P63

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-39949

Vulnerability Information
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Vulnerability Title
Improper validation of sequence numbers leading to remotely reachable assertion failure
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
eProsima Fast DDS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
eProsima Fast DDS是eProsima公司的OMG（对象管理组）DDS（数据分发服务）标准的 C++ 实现。 eProsima Fast DDS 2.9.1之前版本存在安全漏洞，该漏洞源于序列号验证不当可能会导致远程可达断言失败，从而导致Fast-DDS 进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
eProsima Fast-DDS >= 2.7.0, < 2.9.1 -

II. Public POCs for CVE-2023-39949

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8012 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2023-39949

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Vendor Advisories for CVE-2023-39949 (2)

Other References for CVE-2023-39949 (2)

Same Patch Batch · eProsima · 2023-08-11 · 6 CVEs total

CVE-2023-39947 8.2 HIGH Another heap overflow in push_back_helper
CVE-2023-39946 8.2 HIGH Heap overflow in push_back_helper due to a CDR message
CVE-2023-39945 8.2 HIGH Malformed serialized data in a data submessage leads to unhandled exception
CVE-2023-39948 7.5 HIGH Uncaught fastcdr exception (Unexpected CDR type received) crashing fastdds
CVE-2023-39534 7.5 HIGH Malformed GAP submessage triggers assertion failure

IV. Related Vulnerabilities

Same product: Fast-DDS
Same vendor: eProsima
Same weakness: CWE-617

V. Comments for CVE-2023-39949

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