CVE-2023-21918Network attack vector

Recovery Manager denial of service via undisclosed flaw

Published Apr 18, 2023 · Updated Sep 16, 2024

Denial of service in Oracle Database Recovery Manager 19c and 21c allows remote authenticated users to hang or repeatedly crash RMAN. Oracle has not published the defective operation or input-handling path within the Recovery Manager component. Exploitation requires Local SYSDBA privilege and Oracle Net access; the documented consequence is a hang or repeatedly reproducible crash, without confidentiality or integrity impact.

CVSS severity6.8
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Oracle Database Recovery Manager 19c and 21c allows remote authenticated users to hang or repeatedly crash RMAN. Oracle has not published the defective operation or input-handling path within the Recovery Manager component. Exploitation requires Local SYSDBA privilege and Oracle Net access; the documented consequence is a hang or repeatedly reproducible crash, without confidentiality or integrity impact.

The record

CVE
CVE-2023-21918
Published
Apr 18, 2023
Updated
Sep 16, 2024
Vendor
Oracle Corporation
Product
Oracle Database
Classifications
T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=19c
  2. Affected versionversion=21c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · Oracle Databaseversion=19c; version=21c

Published CVSS scores

6.8OracleCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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