CVE-2017-2220
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 · uneditedUntrusted search path vulnerability in Installer of CASL II simulator (self-extract format) allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
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 · moderate confidenceUntrusted search path vulnerability in the self-extracting installer for CASL II simulator allows the installer to load DLLs from attacker-controlled directories. A malicious DLL placed in an unspecified search path will be loaded, enabling privilege escalation.
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<= -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:3.0/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 CASL II simulator is installedCheck for CASL II simulator installation directories (typically C:\Program Files\CASL II or similar) and look for casl2.exe or related executable filesAffected if The CASL II simulator software is present on the system
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Locate the CASL II installer fileSearch for installer files named 'casl' or 'CASL' with .exe extension in download folders, temp directories, or installation mediaAffected if The original installer file is found on the system
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Check for suspicious DLLs in common hijacking locationsExamine the CASL II installation directory and Windows temp folders for unexpected or recently placed DLL files that could have been loaded by the installerAffected if Unexpected DLL files are found in the CASL II directory or temp paths
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Review installation logs or artifactsCheck Windows Installer logs, temp extraction folders used by self-extracting installers, or installation history for evidence of the CASL II installer executionAffected if Logs or artifacts show the CASL II installer was executed
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Verify current user privileges and DLL search path configurationCheck if the installer was run with administrator privileges and review system DLL search path settings (including PATH variable and current working directory)Affected if The installer ran with elevated privileges and vulnerable DLL search path settings are in use
A user is affected if the CASL II simulator installer was executed on their system, as the vulnerability allows DLL hijacking during the installation process leading to potential privilege escalation.
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 dataObtain and use a patched version of the CASL II simulator installer with secure DLL search path handling, or replace the software with an alternative if no patch is available.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2220 — 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-2017-2220 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
- No weaponised exploit code, or anything meant to cause harm
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