HOME VULNERABILITIESCVE-2023-21967

MEDIUM

CVE-2023-21967

NVD-CWE-noinfoPublished: April 18, 2023· Updated: Jun 17, 2026

5.9

CVSS v3.1

Official Description

Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u361, 8u361-perf, 11.0.18, 17.0.6, 20; Oracle GraalVM Enterprise Edition: 20.3.9, 21.3.5 and 22.3.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM Enterprise Edition. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Technical Analysis

CVE-2023-21967 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Debian1 product(s)

debian linux

netapp5 product(s)

7-mode transition toolbrocade san navigatorcloud insights acquisition unitcloud insights storage workload security agentoncommand insight

Oracle4 product(s)

graalvmjdkjreopenjdk

Source: NVD CPE · 22 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/09/msg00018.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20230427-0008/

ADVISORYhttps://www.couchbase.com/alerts/

ADVISORYhttps://www.debian.org/security/2023/dsa-5430

ADVISORYhttps://www.debian.org/security/2023/dsa-5478

ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2023.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2023/09/msg00018.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20230427-0008/

ADVISORYhttps://www.couchbase.com/alerts/

ADVISORYhttps://www.debian.org/security/2023/dsa-5430

ADVISORYhttps://www.debian.org/security/2023/dsa-5478

ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2023.html

All References (14)

→

https://lists.debian.org/debian-lts-announce/2023/09/msg00018.htmlMailing List · Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20230427-0008/Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240621-0006/

→

https://www.couchbase.com/alerts/Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5430Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5478Third Party Advisory

→

https://www.oracle.com/security-alerts/cpuapr2023.htmlVendor Advisory

→

https://lists.debian.org/debian-lts-announce/2023/09/msg00018.htmlMailing List · Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20230427-0008/Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20240621-0006/

→

https://www.couchbase.com/alerts/Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5430Third Party Advisory

→

https://www.debian.org/security/2023/dsa-5478Third Party Advisory

→

https://www.oracle.com/security-alerts/cpuapr2023.htmlVendor Advisory

Quick Facts

CVE IDCVE-2023-21967

CVSS Score5.9 / 10

SeverityMEDIUM

WeaknessNVD-CWE-noinfo

CISA KEVNo

Affected3 vendor(s)

PublishedApr 18, 2023

Related CVEs (NVD-CWE-noinfo)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2023-21967 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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