CVE-2021-20369
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 · uneditedIBM Cloud Pak for Applications 4.3 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 195361.
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 confidenceIBM Cloud Pak for Applications version 4.3 implements weaker-than-expected cryptographic algorithms (such as outdated ciphers or hashing methods) that enable an attacker to decrypt highly sensitive data. The vulnerability affects data-at-rest or in-transit encryption where weak cryptographic primitives are used.
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< 4.3.1CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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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Verify IBM Cloud Pak for Applications versionUse the IBM Cloud Pak CLI (cloudctl) or check the operator subscription: run 'cloudctl version' or inspect the ibm-cloudpak-applications operator version in the OperatorHub or OCP consoleAffected if The installed version is below 4.3.1 (e.g., 4.3.0 or earlier)
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Inspect TLS configuration for weak ciphersExamine the TLS/SSL configuration files and ingress configurations in the cluster. Check for cipher suites such as RC4, 3DES, MD5, or export-grade ciphers in the IBM Cloud Pak configurationAffected if Weak or outdated cipher suites (e.g., TLS 1.0/1.1, CBC mode ciphers, NULL encryption) are configured or enabled
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Review data-at-rest encryption settingsInspect the storage configuration and any database or secret storage encryption settings used by IBM Cloud Pak for Applications. Look for encryption configuration manifests or configmapsAffected if Legacy or weak encryption algorithms (such as AES-128 with weak modes, or deprecated hashing like MD5/SHA1) are used for encrypting stored data
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Check application-level cryptographic implementationsReview any custom or bundled applications within the Cloud Pak that handle encryption. Look for Java keyStores, crypto configuration files, or application properties specifying crypto algorithmsAffected if Applications use deprecated cryptographic primitives or hardcoded weak algorithms for encryption or signing
You are affected if IBM Cloud Pak for Applications version is below 4.3.1 and weak cryptographic algorithms (outdated ciphers, weak hashing, or deprecated encryption) are configured or in use for data-at-rest or in-transit.
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 data4.3.1
Replace weak cryptographic algorithms with industry-standard strong algorithms (e.g., AES-256, SHA-256+) and review all encryption implementations across the platform. Verify that TLS configurations use strong cipher suites.
- Consultation8.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20369 — 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-2021-20369 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
- No spam, self-promotion, credentials, or personal data