CVE-2021-34295
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 JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Gif_loader.dll library in affected applications lacks proper validation of user-supplied data when parsing GIF files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13024)
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 Gif_loader.dll library of JT2Go and Teamcenter Visualization. The library fails to properly validate user-supplied data during GIF file parsing, leading to an out-of-bounds write beyond allocated memory structures. This memory corruption can be leveraged by an attacker to achieve arbitrary code execution within the context of the running 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< 13.2.0< 13.2.0CVSS 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
- 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 if JT2Go or Teamcenter Visualization is installedCheck the system for presence of JT2Go or Teamcenter Visualization applications. Look in standard installation directories such as C:\Program Files\Siemens or check the Windows Add/Remove Programs list.Affected if Neither JT2Go nor Teamcenter Visualization is installed on the system.
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Determine the installed version of JT2GoIf JT2Go is installed, right-click the executable (typically named JT2Go.exe), select Properties, and view the Version tab to obtain the product version number.Affected if The displayed version is lower than 13.2.0.
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Determine the installed version of Teamcenter VisualizationIf Teamcenter Visualization is installed, right-click the executable (typically named TcVis.exe or similar), select Properties, and view the Version tab to obtain the product version number.Affected if The displayed version is lower than 13.2.0.
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Locate and check the Gif_loader.dll versionSearch for Gif_loader.dll within the application installation directory (commonly found in the bin or program folder of the Siemens product). Right-click the DLL, select Properties, and view the Version information.Affected if The DLL version cannot be verified as 13.2.0 or later, or the product version is below 13.2.0.
The environment is affected if either JT2Go or Teamcenter Visualization is installed with a version lower than 13.2.0, as this indicates the vulnerable Gif_loader.dll library is present.
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 data13.2.0
Upgrade JT2Go and Teamcenter Visualization to version 13.2 or later to obtain the patched Gif_loader.dll library. As a defense-in-depth measure, avoid opening untrusted GIF files from unknown or untrusted sources.
- Consultation2.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-34295 — 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-2021-34295 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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