CVE-2021-33714
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 < V13.0.2.0). When parsing specially crafted JT files, a missing check for the validity of an iterator leads to NULL pointer deference condition, causing the application to crash. An attacker could leverage this vulnerability to cause a Denial-of-Service condition in the application.
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 NULL pointer dereference vulnerability exists in JT Utilities versions prior to V13.0.2.0 when parsing JT files. The vulnerability stems from a missing validation check for iterator validity during JT file parsing, leading to dereferencing a NULL pointer and causing the application to crash.
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< 13.0.2.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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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Locate JT Utilities installationSearch for the JT Utilities application in common program directories or check the system's installed software list. Common locations include C:\Program Files\Siemens\ or /usr/local/ on Linux systems. Use 'where jt' or 'find / -name "*JT*" -type f' to locate executable files.Affected if JT Utilities is found on the system
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Identify installed JT Utilities versionRun the JT Utilities executable with a version flag, such as 'jtutil -v' or 'jtutil --version', or right-click the executable and select Properties > Details to view the version information.Affected if The version displayed is less than 13.0.2.0 or the version cannot be determined (unknown)
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Verify JT file parsing functionalityAttempt to open or parse a JT file using the installed JT Utilities tool. If the tool crashes, hangs, or produces an error related to NULL pointer dereference during parsing, this indicates the vulnerability may be present.Affected if The application crashes when parsing JT files, particularly files that trigger the iterator validity issue
The system is affected if JT Utilities version is installed and the version is lower than 13.0.2.0, or if parsing JT files causes crashes consistent with NULL pointer dereference.
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 data13.0.2.0
Upgrade JT Utilities to version V13.0.2.0 or later to remediate this vulnerability.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-33714 — 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-2021-33714 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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