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CVE Record

CVE-2021-2234: Vulnerability in the Java VM component of Oracle Database Server.

Vulnerability in the Java VM component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and 19c. Difficult to exploit vulnerability allows low privileged attacker having Create Session privilege with network access via Oracle Net to compromise Java VM. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Java VM accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N).

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2234 affects Oracle Database Java VM in supported 12.1.0.2, 12.2.0.1, 18c, and 19c deployments. A low-privileged database user with Create Session and Oracle Net access could modify, create, or delete Java VM-accessible data. Exploitation is rated difficult, and public evidence here does not show active exploitation.

Executive priority

Treat as a scheduled but important database integrity risk. Prioritize internet- or broadly reachable Oracle Net environments and systems containing critical data, especially where many low-privileged accounts exist.

Technical view

The issue is in Oracle Database Server's Java VM component. The CVSS 3.1 vector is AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N, score 5.3. Impact is integrity-only: unauthorized creation, deletion, or modification of critical data or all Java VM-accessible data. No CWE or root-cause detail is provided in the supplied sources.

Likely exposure

Exposure is most likely in Oracle Database Enterprise Edition 12.1.0.2, 12.2.0.1, 18c, or 19c where Oracle Net is reachable and low-privileged accounts can authenticate with Create Session.

Exploitation context

The source bundle does not identify active exploitation, and this CVE is not marked as KEV. Exploitation requires network access via Oracle Net, a valid low-privileged account, Create Session privilege, and high attack complexity.

Researcher notes

Available evidence supports integrity impact but not confidentiality or availability impact. Root cause, exploit maturity, and detailed detection logic are not provided. Avoid assuming affected products beyond Oracle Database Enterprise Edition versions listed in the source bundle.

Mitigation direction

  • Apply Oracle April 2021 CPU guidance or later applicable vendor patches.
  • Restrict Oracle Net access to trusted networks and required clients.
  • Review and minimize accounts with Create Session privilege.
  • Assess whether Java VM is required and harden access around it.
  • Monitor Oracle guidance for version-specific remediation details.

Validation and detection

  • Inventory Oracle Database versions and editions in scope.
  • Confirm patch level against Oracle April 2021 CPU guidance.
  • List users with Create Session privilege and business justification.
  • Validate Oracle Net exposure from untrusted network segments.
  • Review database audit logs for suspicious Java VM-related data changes.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

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 lookup
cve · low confidence lookup

CVE-2021-2234 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N1.63.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2021-2234Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationDatabase - Enterprise Edition12.1.0.2, 12.2.0.1, 18c, 19cListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.