CVE-2015-4820
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 · uneditedUnspecified vulnerability in Oracle Sun Solaris 11.2 allows local users to affect confidentiality, integrity, and availability via unknown vectors related to Solaris Kernel Zones, a different vulnerability than CVE-2015-4907.
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 · low confidenceLocal privilege escalation or zone isolation bypass vulnerability in Oracle Solaris 11.2's Kernel Zones component. The vulnerability allows a local authenticated user to potentially compromise confidentiality, integrity, and availability of the system through unspecified vectors affecting the kernel-level zone isolation.
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= 11.2CVSS 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
- Local
- Complexity
- High
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:L/AC:H/Au:N/C:C/I:C/A:C
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.
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Identify the Oracle Solaris versionRun 'uname -r' or 'cat /etc/release' to confirm the installed Solaris versionAffected if The version is exactly 11.2 - other versions are not affected by this specific CVE
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Verify Kernel Zones are presentCheck if Kernel Zones are configured on the system using 'zoneadm list -cp' or by examining /etc/zones/ directory contentsAffected if Kernel Zones are actively configured or running on the system
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Check for Oracle security patchesRun 'showrev -p' to list installed patches, then compare against Oracle Critical Patch Updates for Solaris 11.2 from 2015 and laterAffected if No Oracle kernel zones security patches from 2015 or later have been applied to Solaris 11.2
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Audit local user zone privilegesReview /etc/user_attr or use 'userattr' to check if any local users have zone administration privileges or profilesAffected if Untrusted local users have been granted zoneadm or Zone Administrator roles
The system is affected only if it is running Oracle Solaris 11.2 with Kernel Zones enabled and missing Oracle security patches for the Kernel Zones vulnerability.
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 Critical Patch Update patches for Solaris 11.2, specifically addressing Kernel Zones vulnerabilities. If patches are unavailable, consider restricting local user access to zone administrative functions and monitoring for suspicious zone behavior.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-4820 — 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-2015-4820 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
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- 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