dbcve.org
Jt Open ToolkitApplication · Siemens

CVE-2021-44437

HIGH · 7.8 CVSS v3.1 Published 2021-12-14
Fix available
A fix is available. Upgrade to 11.1.1.0 / 13.1.1.0 or later.
See remediation →
81/100
Remediation priority · High
No privileges

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 · unedited
A 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 an out of bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-14906)

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 confidence

A memory corruption vulnerability in the JTTK library allows an out-of-bounds write when parsing malicious JT files, potentially enabling arbitrary code execution in the context of the current process.

MitigationUpgrade JT Utilities to version V13.1.1.0 or later and JTTK to version V11.1.1.0 or later to obtain the security patches.

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
Jt Open ToolkitApplication
Affected:< 11.1.1.0
Jt UtilitiesApplication
Affected:< 13.1.1.0

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Jt Open Toolkit (JTTK) is installed
    Check for the presence of JTTK libraries or SDK files in your installation directory, or query your package manager if installed via one. Look for files named jttk.jar, jtkit.jar, or similar JT-related JAR files.
    Affected if The installed version is below 11.1.1.0 (version cannot be determined, or the library is present without a version visible)
  2. Identify if JT Utilities is installed
    Check for the presence of JT Utilities executables or installation files. Look for directories containing 'JT' or 'Siemens' in your program files or application paths.
    Affected if The installed version is below 13.1.1.0 (version cannot be determined, or the software is present without a version visible)
  3. Determine the exact version of JTTK
    If JTTK is present, examine the manifest file inside any JAR file (META-INF/MANIFEST.MF), or check the file properties/version info for DLL files if using a native implementation. Compare the version string to 11.1.1.0.
    Affected if The version shown is less than 11.1.1.0
  4. Determine the exact version of JT Utilities
    If JT Utilities are present, run the utility with a version flag (such as -v, --version, or check the About dialog if GUI-based), or examine the installer/executable properties. Compare the version string to 13.1.1.0.
    Affected if The version shown is less than 13.1.1.0
  5. Assess if JT file parsing is in use
    Determine whether your application or workflow involves opening, importing, or processing JT files using the affected library. Review application logs or usage patterns for JT file operations.
    Affected if JT files are being parsed by a version of JTTK below 11.1.1.0 or JT Utilities below 13.1.1.0

You are affected if you have JTTK below version 11.1.1.0 or JT Utilities below version 13.1.1.0 AND your system parses JT files with these vulnerable components.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 11.1.1.0 / 13.1.1.0 or later
Fixed in 11.1.1.013.1.1.0
Interim mitigation

Upgrade JT Utilities to version V13.1.1.0 or later and JTTK to version V11.1.1.0 or later to obtain the security patches.

Recommended fix High confidence

Jt Open Toolkit (JTTK): upgrade to v11.1.1.0 or later; Jt Utilities: upgrade to v13.1.1.0 or later

  1. Identify which affected product is in use: Jt Open Toolkit (JTTK) or Jt Utilities
  2. Check current installed version to confirm it is below the fixed release (JTTK < 11.1.1.0, JT Utilities < 13.1.1.0)
  3. Obtain the fixed version from the official Siemens software distribution channel (e.g., Siemens Product Support or customer portal)
  4. Test the upgrade in a non-production environment before deploying
  5. Apply the upgrade following standard deployment procedures
  6. Validate the installation and test that JT file parsing functions correctly

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Jt Open Toolkit Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,440
Get the upgrade done

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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-44437 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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