CVE-2015-1956
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 MQ Light before 1.0.0.2 allows remote attackers to cause a denial of service (disk consumption) via a crafted byte sequence in authentication data, a different vulnerability than CVE-2015-1958 and CVE-2015-1987.
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 confidenceIBM MQ Light versions prior to 1.0.0.2 contain a denial of service vulnerability where remote attackers can trigger excessive disk consumption by sending a crafted byte sequence within authentication data. The vulnerability exploits how the application processes authentication information, causing unbounded disk space usage.
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= 1.0= 1.0.0.1CVSS 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
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/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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Confirm IBM MQ Light is installedCheck for IBM MQ Light installation by looking for the product directory (typically under /opt/ibm/mqlight or C:\Program Files\ibm\mqlight) or by running platform-specific commands like 'ls' or registry queries on WindowsAffected if IBM MQ Light software is present on the system
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Identify installed versionRun the MQ Light version command: on Linux/Unix check /opt/ibm/mqlight/lib/version.txt or run 'mqlight -version', on Windows check the installation directory for version information or use Windows inventory toolsAffected if The version returned is 1.0 or 1.0.0.1 specifically
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Verify authentication is enabledInspect the MQ Light configuration files (typically in the conf directory under the installation path) for authentication settings, or check if the AMQP port (5672 by default) is exposed with authentication mechanisms configuredAffected if Authentication processing is enabled and the service is listening for remote connections on the AMQP port
A system is affected if IBM MQ Light version 1.0 or 1.0.0.1 is installed with authentication enabled and exposed to network traffic, as the vulnerability requires the authentication processing code path to be exercised by remote attackers.
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 IBM MQ Light to version 1.0.0.2 or later to patch this vulnerability. Consider implementing network-level access controls to limit exposure to untrusted remote attackers until the upgrade can be performed.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-1956 — 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-2015-1956 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
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