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Jt Open ToolkitApplication · Siemens

CVE-2021-44450

HIGH · 7.8 CVSS v3.1 Published 2021-12-14
Fix available
A fix is available. Upgrade to 10.8.8.1 / 12.8.8.1 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 < V12.8.1.1), JTTK (All versions < V10.8.1.1). JTTK library in affected products is vulnerable to an out of bounds read past the end of an allocated buffer when parsing JT files. An attacker could leverage this vulnerability to leak information in the context of the current process. (ZDI-CAN-15055, ZDI-CAN-14915, ZDI-CAN-14865)

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

Out of bounds read vulnerability in the JTTK library when parsing JT files allows an attacker to read past the end of an allocated buffer, leaking sensitive information from process memory.

MitigationUpgrade JT Utilities to version V12.8.1.1 or later and JTTK to version V10.8.1.1 or later to resolve the vulnerability.

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:< 10.8.8.1
Jt UtilitiesApplication
Affected:< 12.8.8.1

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 JTTK or JT Utilities are installed
    Search for Siemens JT-related software in common installation directories (Program Files/Siemens), or look for jtkit*.dll, jtopen*.jar files, or jtutilities executables on the system
    Affected if Either Siemens Jt Open Toolkit or Siemens JT Utilities is present on the system
  2. Determine installed JTTK version
    Locate the JTTK library file (jtopen*.jar or jtkit*.dll) and check its version metadata via file properties, or run 'java -jar jtopen*.jar --version' if the JAR is executable
    Affected if The JTTK version is found to be below 10.8.8.1
  3. Determine installed JT Utilities version
    Locate the JT Utilities installation directory and check the version from the executable properties, readme file, or a dedicated version/info file included in the installation
    Affected if The JT Utilities version is found to be below 12.8.8.1
  4. Verify JT file parsing is active
    Review application logs, scheduled jobs, or configuration files to determine if the system processes or parses JT files (file extension .jt)
    Affected if The environment parses or processes JT files using a vulnerable version of the library

If either JTTK version < 10.8.8.1 or JT Utilities version < 12.8.8.1 is installed AND the environment parses JT files, the system is affected by this vulnerability

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 10.8.8.1 / 12.8.8.1 or later
Fixed in 10.8.8.112.8.8.1
Interim mitigation

Upgrade JT Utilities to version V12.8.1.1 or later and JTTK to version V10.8.1.1 or later to resolve the vulnerability.

Recommended fix High confidence

Jt Open Toolkit: V10.8.1.1+ | JT Utilities: V12.8.1.1+

  1. 1. Identify all systems and applications using the JT Open Toolkit (JTTK) library
  2. 2. Identify all systems and applications using JT Utilities
  3. 3. For JTTK: Upgrade to version 10.8.1.1 or later
  4. 4. For JT Utilities: Upgrade to version 12.8.1.1 or later
  5. 5. Verify the upgrade by checking the library version matches or exceeds the fixed releases
  6. 6. Re-test any JT file parsing functionality to ensure normal operation
Caveat Review release notes for any API changes between your current version and the fixed release

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

Fix this in Jt Open Toolkit Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing12.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,760
Get the upgrade done

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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-2021-44450 in production — separate from our analysis above.

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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