CVE-2023-21984Network attack vector

Authenticated system hang or repeated crash

Published Apr 18, 2023 · Updated Sep 16, 2024

Denial of service in Oracle Solaris 11 Libraries allows remote authenticated users to hang or repeatedly crash the system via HTTP. Oracle has not published the affected library, request field, or faulty operation that processes untrusted HTTP input. Low-privileged access is required; exploitation causes complete service interruption without reported data exposure or modification.

CVSS severity6.5
Medium
EPSS probability0.66%
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 Solaris 11 Libraries allows remote authenticated users to hang or repeatedly crash the system via HTTP. Oracle has not published the affected library, request field, or faulty operation that processes untrusted HTTP input. Low-privileged access is required; exploitation causes complete service interruption without reported data exposure or modification.

The record

CVE
CVE-2023-21984
Published
Apr 18, 2023
Updated
Sep 16, 2024
Vendor
Oracle
Product
Oracle Solaris
Classifications
T1499
Attack vector
network
Privileges
authenticated

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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle · Oracle Solarisversion=11

Published CVSS scores

6.5OracleCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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