CVE-2019-4036
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 Security Access Manager Appliance could allow unauthenticated attacker to cause a denial of service in the reverse proxy component. IBM X-Force ID: 156159.
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 Security Access Manager Appliance contains a vulnerability in its reverse proxy component that allows an unauthenticated attacker to cause a denial of service. The attacker does not need credentials to exploit this flaw, leading to service disruption.
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 dataall versionsCVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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.
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Confirm IBM Security Access Manager deploymentLocate and identify IBM Security Access Manager (ISAM) Appliance installations in your environment by checking installed software, virtual appliances, or container images bearing the ISAM product name.Affected if The product is present in your environment
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Identify reverse proxy componentCheck the ISAM appliance configuration or documentation to determine if the reverse proxy component (also known as the Web Reverse Proxy) is enabled and configured.Affected if The reverse proxy feature is configured and active
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Verify external accessibilityInspect network configurations, firewall rules, or load balancer settings to determine if the reverse proxy service is exposed to external networks or the internet.Affected if The reverse proxy is accessible from untrusted networks without additional protective controls
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Review current version and patch statusAccess the appliance admin console or use system commands to determine the currently installed version and check whether the CVE-2019-4036 fix has been applied.Affected if The installed version has not received the IBM security patch for CVE-2019-4036
You are affected if IBM Security Access Manager Appliance with an active reverse proxy component is deployed in your environment and has not received the IBM fix for CVE-2019-4036.
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 the IBM fix/patch for CVE-2019-4036 from IBM support. Until patched, consider implementing rate limiting or firewall controls on the reverse proxy to mitigate potential DoS attempts.
- Consultation3.0 h
- Implementation3.0 h
- Testing3.0 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 $3,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-4036 — 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-2019-4036 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