JenkinsApplication
CVE-2017-1000503
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 · uneditedA race condition during Jenkins 2.81 through 2.94 (inclusive); 2.89.1 startup could result in the wrong order of execution of commands during initialization. This could in rare cases result in failure to initialize the setup wizard on the first startup. This resulted in multiple security-related settings not being set to their usual strict default.
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 · high confidenceA race condition in Jenkins versions 2.81 through 2.94 and 2.89.1 causes commands to execute in the wrong order during startup initialization. This can prevent the setup wizard from initializing properly, leaving security-related settings at insecure default values rather than their intended strict defaults.
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
JenkinsApplication
>= 2.81, <= 2.94= 2.89.1CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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.
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Determine installed Jenkins versionCheck the Jenkins version displayed on the dashboard footer, or run 'java -jar jenkins.war --version' if you have access to the war file, or check via package manager (dpkg -l jenkins or rpm -q jenkins)Affected if The installed version is 2.81 through 2.94 inclusive, or exactly 2.89.1
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Check if initial setup wizard completedLook for the presence and content of $JENKINS_HOME/jenkins.install.InstallUtil.lastExecVersion; if the file is missing, the setup wizard never ran, or if the version recorded differs from the current version, the wizard may have been interruptedAffected if The setup wizard did not complete successfully during first startup
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Verify security authorization settingsNavigate to Manage Jenkins > Configure Global Security and check the Authorization setting; verify it is NOT set to 'Anyone can do anything' or 'Legacy mode' with anonymous full accessAffected if Authorization is set to allow anonymous users full administrative privileges
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Confirm security realm configurationNavigate to Manage Jenkins > Configure Global Security and verify the Security Realm is properly configured with active user authentication, not set to 'Unix user/group database' or 'Servlet container proxy' without proper group mappingAffected if Security realm is not properly configured with active authentication or defaults are insecure
If running an affected version and the setup wizard did not complete properly or security settings are at insecure defaults (anonymous full access, unauthenticated access), the environment is vulnerable to CVE-2017-1000503.
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 dataUpgrade Jenkins to version 2.95 or later to resolve the race condition. After upgrading, verify that security settings are properly configured to their strict defaults.
Fix this in Jenkins
Scoped from the published advisory
- Consultation4.0 h
- Implementation4.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,504.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-1000503 — 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-2017-1000503 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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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
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