CVE-2021-44432
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 vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected products is vulnerable to stack based buffer overflow while parsing specially crafted JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-14845)
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 stack-based buffer overflow vulnerability exists in the JTTK library used by JT Utilities. When parsing specially crafted JT files, the library fails to properly validate input buffer sizes before copying data onto the stack, allowing an attacker to overwrite return addresses and execute arbitrary code in the context of the current process.
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< 11.1.1.0< 13.1.1.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 JTTK library versionLocate the Jt Open Toolkit (JTTK) library file in your installation directory and check its file version properties, or use your system's package manager or software inventory to find the installed Jt Open Toolkit versionAffected if The installed version is lower than 11.1.1.0
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Identify JT Utilities versionLocate the JT Utilities application in your installation directory and check its file version properties, or use your system's package manager or software inventory to find the installed JT Utilities versionAffected if The installed version is lower than 13.1.1.0
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Confirm JT file processing capabilityVerify that JT Utilities or any application using JTTK is configured to parse JT files. Check application settings or configuration files for JT file import or processing featuresAffected if JT file parsing is enabled and the version checks above show vulnerable versions
You are affected if JT Utilities or an application using JTTK with a version lower than 13.1.1.0 (for utilities) or 11.1.1.0 (for JTTK) is installed and configured to parse JT files
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.
dbcve · scoped11.1.1.013.1.1.0
Upgrade JTTK to version 11.1.1.0 or later and JT Utilities to version 13.1.1.0 or later. Do not open JT files from untrusted sources until the update is applied.
Jt Open Toolkit: V11.1.1.0 or later; JT Utilities: V13.1.1.0 or later
- 1. Identify which affected product(s) are in use: Jt Open Toolkit (JTTK) or JT Utilities
- 2. For Jt Open Toolkit: upgrade to version 11.1.1.0 or later
- 3. For JT Utilities: upgrade to version 13.1.1.0 or later
- 4. Obtain the updated software from the official Siemens cert-portal or appropriate Siemens distribution channel
- 5. Test the upgraded software in a non-production environment before deploying
- 6. Deploy the upgraded version to production environments
- 7. Verify that JT file parsing functionality works correctly after upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-44432 — 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-2021-44432 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
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