Security readout for executives and security teams
Plain-English summary
CVE-2021-2330 is an Oracle Database Server Core RDBMS flaw affecting Oracle Database Enterprise Edition 19c. A low-privileged user with Create Table privilege and Oracle Net access could trigger a partial denial of service. The disclosed impact is availability only, not data theft or data modification.
Executive priority
Treat as a moderate operational risk for Oracle Database 19c. It does not indicate data compromise, but partial database service disruption can affect business applications. Prioritize patch verification and privilege review for production databases.
Technical view
Oracle rates this as CVSS 3.1 score 4.3: AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L. The vulnerable component is Core RDBMS in Database Enterprise Edition 19c. Successful exploitation can cause partial denial of service against Core RDBMS when the attacker has Create Table privilege and network access via Oracle Net.
Likely exposure
Exposure is most likely in Oracle Database Enterprise Edition 19c environments where low-privileged accounts can connect through Oracle Net and have Create Table privilege. The source bundle does not identify other affected versions or products.
Exploitation context
The CVE states the issue is easily exploitable by a low-privileged attacker, but requires Create Table privilege. CISA KEV is false in the supplied bundle, and no cited source states active exploitation.
Researcher notes
The public description is concise and gives no CWE, proof-of-concept, or root-cause details. Validation should focus on affected version, patch status, Oracle Net reachability, and Create Table privilege exposure. Avoid assuming impact beyond partial denial of service.
Mitigation direction
- Review Oracle July 2021 Critical Patch Update guidance for CVE-2021-2330.
- Apply applicable Oracle Database 19c security updates according to vendor guidance.
- Limit Oracle Net access to trusted networks and approved users.
- Review and reduce unnecessary Create Table grants for low-privileged accounts.
- Monitor Core RDBMS availability events for unusual partial service disruption.
Validation and detection
- Inventory Oracle Database Enterprise Edition 19c instances.
- Confirm each instance includes the relevant Oracle July 2021 CPU fixes or later guidance.
- Identify accounts with Create Table privilege and Oracle Net access.
- Verify network controls restrict Oracle Net exposure to expected sources.
- Review monitoring for unexplained Core RDBMS partial availability issues.
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.
Database behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-2330 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
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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:L/UI:N/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpujul2021.htmlCVE reference · x_refsource_MISC
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.