Security readout for executives and security teams
Plain-English summary
OpenDDS before 3.18.1 can be abused over the network to create unwanted traffic toward target devices, potentially causing denial of service. The issue is high severity because it requires no authentication or user interaction and has high availability impact.
Executive priority
Prioritize this for systems where OpenDDS supports production, industrial, or customer-facing operations. Business risk is primarily service disruption, with limited confidentiality and integrity impact noted in the CVSS vector.
Technical view
CVE-2021-38447 affects OCI OpenDDS versions prior to 3.18.1. A specially crafted packet can trigger traffic amplification and flood target devices. The CVSS 3.1 score is 8.6, with network access, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Organizations using OpenDDS before 3.18.1 in networked applications are potentially exposed. Exposure is most relevant where OpenDDS traffic is reachable across untrusted, partner, or operational networks. The bundle does not identify specific downstream products or deployments.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is remotely reachable and low complexity, so internet- or broadly network-exposed deployments should be treated as urgent until inventoried.
Researcher notes
The issue maps to CWE-405, asymmetric resource consumption. Public details in the bundle describe crafted-packet amplification but do not provide deeper protocol conditions, affected configurations, or product-specific advisories beyond OCI OpenDDS before 3.18.1.
Mitigation direction
- Inventory applications and devices using OCI OpenDDS.
- Upgrade OpenDDS to 3.18.1 or later where supported.
- Check OCI and CISA guidance for vendor-specific remediation.
- Restrict OpenDDS network exposure to trusted systems only.
- Monitor for unusual traffic amplification or denial-of-service patterns.
Validation and detection
- Confirm deployed OpenDDS versions across applications and devices.
- Identify whether OpenDDS services are reachable from untrusted networks.
- Verify patched systems report version 3.18.1 or later.
- Review firewall rules and segmentation around DDS/OpenDDS traffic.
- Check logs and network telemetry for flood-related anomalies.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-405: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-38447 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H3.94.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02CVE reference · x_refsource_CONFIRM
- https://opendds.org/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Asymmetric Resource Consumption (Amplification)
Asymmetric Resource Consumption (Amplification) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.