CVE-2023-21984
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedVulnerability in the Oracle Solaris product of Oracle Systems (component: Libraries). The supported version that is affected is 11. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceVulnerability in Oracle Solaris 11's Libraries component allows a low-privileged attacker with network access via HTTP to cause a complete denial of service, resulting in system hang or repeatable crashes. The attack requires no user interaction and exploits a flaw in library code used by network-accessible services.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 11CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Confirm Oracle Solaris versionRun 'uname -a' or 'cat /etc/release' to identify the installed Solaris versionAffected if The system is running Oracle Solaris 11 (version 11)
-
Identify running network servicesRun 'svcs -a | grep online' to list all active services, then check for HTTP-listening services using 'netstat -an | grep LISTEN' or 'sockstat'Affected if HTTP network-accessible services are running on the system
-
Check for exposed HTTP daemonsInspect configuration files in /etc/httpd/, /etc/apache2/, or service-specific configs to identify HTTP services bound to network interfacesAffected if HTTP services are configured to accept network connections (not localhost-only)
-
Verify library dependenciesUse 'ldd' on suspected vulnerable service binaries (such as httpd, apache, or Oracle HTTP Server) to identify which libraries from /usr/lib/ they loadAffected if Network services link against libraries in the affected Oracle Solaris Libraries component
-
Review network exposureCheck firewall rules with 'ipf -V' or 'pfctl -sr' and review /etc/hosts.allow and /etc/hosts.deny for TCP wrapper configurationAffected if The system accepts network connections from untrusted sources on HTTP ports (typically 80/443)
The environment is affected if running Oracle Solaris 11 with any HTTP-listening network services exposed to untrusted network access, since the vulnerability resides in library code used by such services.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply Oracle's security patches for CVE-2023-21984 via Oracle Critical Patch Updates for Solaris 11. Restrict network access to Solaris systems and minimize exposed HTTP services until patching is complete.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-21984 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-21984 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data