OlingoApplication · Apache
CVE-2019-17556
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 · uneditedApache Olingo versions 4.0.0 to 4.6.0 provide the AbstractService class, which is public API, uses ObjectInputStream and doesn't check classes being deserialized. If an attacker can feed malicious metadata to the class, then it may result in running attacker's code in the worse case.
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 confidenceApache Olingo versions 4.0.0 to 4.6.0 contain an insecure deserialization vulnerability in the public AbstractService API class. The class uses ObjectInputStream without validating or whitelisting classes during deserialization, allowing attackers to inject malicious serialized objects (potentially gadget chains) that can execute arbitrary code when the application deserializes untrusted metadata.
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
OlingoApplication
>= 4.0.0, <= 4.6.0CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/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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Identify Apache Olingo versionInspect JAR files in the application lib or classpath for olingo-*.jar files, check Maven pom.xml dependencies, or run: jar -tf <jarfile> | grep -i 'olingo' to locate version identifiers in manifest or package namesAffected if The installed version is between 4.0.0 and 4.6.0 inclusive
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Locate AbstractService class usageSearch codebase for imports or references to org.apache.olingo.*.AbstractService class, or scan compiled classes: find . -name '*.class' | xargs -I {} sh -c 'javap -c {} 2>/dev/null | grep -q AbstractService && echo {}'Affected if The AbstractService class from Apache Olingo is present and loaded by the application
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Verify ObjectInputStream deserialization usageSearch source code or decompiled classes for ObjectInputStream usage patterns: grep -r 'ObjectInputStream' --include='*.java' . or analyze bytecode for readObject() calls on Olingo classesAffected if ObjectInputStream is used without class validation or whitelisting in Olingo deserialization code
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Determine if untrusted metadata is processedReview application code that handles OData metadata input from external sources, check if XML or JSON metadata is deserialized via the vulnerable API without prior validationAffected if The application deserializes untrusted or externally-sourced metadata through the AbstractService API
The environment is affected if Apache Olingo version 4.0.0-4.6.0 is deployed AND the AbstractService class is used to deserialize untrusted data via ObjectInputStream without class validation.
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 Apache Olingo to version 4.7.0 or later which addresses the unsafe deserialization. If upgrade is not immediately feasible, implement input validation and consider restricting ObjectInputStream to use a whitelist of allowed classes.
Fix this in Olingo
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-2019-17556 — 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-2019-17556 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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- Version or environment caveats, and links to real fixes
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