RTI Connext DDS Professional Packet amplification

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in RTI Connext DDS Professional, Connext DDS Secure and Connext DDS Micro. Affected is an unknown function of the component Packet Handler. This manipulation causes an unknown weakness. This vulnerability is handled as CVE-2021-38487. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in RTI Connext DDS Professional, Connext DDS Secure and Connext DDS Micro (affected version unknown) and classified as critical. Affected by this vulnerability is an unknown functionality of the component Packet Handler. The CWE definition for the vulnerability is CWE-406. The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor. As an impact it is known to affect confidentiality, and availability. The summary by CVE is:

RTI Connext DDS Professional, Connext DDS Secure versions 4.2x to 6.1.0, and Connext DDS Micro versions 2.4 and later are vulnerable when an attacker sends a specially crafted packet to flood target devices with unwanted traffic. This may result in a denial-of-service condition and information exposure.

The weakness was released 11/17/2021 as icsa-21-315-02. It is possible to read the advisory at us-cert.cisa.gov. This vulnerability is known as CVE-2021-38487. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/23/2025). The attack technique deployed by this issue is T1499.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.5
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 8.2
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Amplification
CWE: CWE-406 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/10/2021 🔍
11/17/2021 +99 days 🔍
11/17/2021 +0 days 🔍
06/23/2025 +1314 days 🔍

Sourcesinfo

Advisory: icsa-21-315-02
Status: Not defined

CVE: CVE-2021-38487 (🔍)
GCVE (CVE): GCVE-0-2021-38487
GCVE (VulDB): GCVE-100-186691

Entryinfo

Created: 11/17/2021 14:35
Updated: 06/23/2025 14:45
Changes: 11/17/2021 14:35 (35), 11/19/2021 08:52 (1), 02/05/2025 14:35 (58), 06/23/2025 14:45 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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