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CVE Record

CVE-2020-2734: Vulnerability in the RDBMS/Optimizer component of Oracle Database Server.

Vulnerability in the RDBMS/Optimizer component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and 19c. Easily exploitable vulnerability allows high privileged attacker having Execute on DBMS_SQLTUNE privilege with network access via Oracle Net to compromise RDBMS/Optimizer. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of RDBMS/Optimizer accessible data. CVSS 3.0 Base Score 2.4 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N).

LowCVSS 2.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2020-2734 is a low-severity Oracle Database issue that could let a highly privileged database user read limited optimizer-related data. It requires Oracle Net access, the DBMS_SQLTUNE execute privilege, and interaction by another person, so exposure is narrow compared with unauthenticated database flaws.

Executive priority

Handle through normal database patch and privilege-review governance. Escalate priority only for internet-reachable databases, sensitive workloads, or unusually broad DBMS_SQLTUNE privileges.

Technical view

The vulnerability affects Oracle Database Server RDBMS/Optimizer in versions 12.1.0.2, 12.2.0.1, 18c, and 19c. CVSS 3.0 is 2.4: network reachable, low attack complexity, high privileges required, user interaction required, and low confidentiality impact only.

Likely exposure

Exposure is most plausible in affected Oracle Database environments where nonessential users or roles have Execute on DBMS_SQLTUNE and can reach the database over Oracle Net.

Exploitation context

The source bundle does not show active exploitation, and the CVE is not marked CISA KEV. Successful exploitation requires high privileges and human interaction, reducing likely real-world urgency.

Researcher notes

Key constraints are PR:H and UI:R. The publicly provided data indicates only unauthorized read access to a subset of RDBMS/Optimizer accessible data, with no integrity or availability impact stated.

Mitigation direction

  • Review Oracle April 2020 Critical Patch Update guidance for applicable database fixes.
  • Prioritize affected databases with sensitive data or broad DBMS_SQLTUNE grants.
  • Restrict DBMS_SQLTUNE Execute privilege to required administrative users only.
  • Limit Oracle Net access to trusted administration and application paths.
  • Follow current Oracle support guidance for still-supported database releases.

Validation and detection

  • Inventory Oracle Database versions 12.1.0.2, 12.2.0.1, 18c, and 19c.
  • Identify users and roles granted Execute on DBMS_SQLTUNE.
  • Confirm Oracle Net exposure is limited to expected networks.
  • Check patch status against Oracle April 2020 CPU guidance.
  • Review audit logs for unexpected privileged tuning activity.
Prepared
Confidence
high
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-2020-2734 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
Low
CVSS
2.4 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/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
2.4CVSS 3.0LowCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N0.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

2.4Low
CVSS 3.0 vector shape for CVE-2020-2734Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/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 CorporationOracle Database12.1.0.2, 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.