CVE-2017-2253
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 Yahoo! Toolbar (for Internet explorer) v8.0.0.6 and earlier, with its timestamp prior to June 13, 2017, 18:18:55 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 · high confidenceThe Yahoo! Toolbar installer for Internet Explorer versions 8.0.0.6 and earlier loads Dynamic Link Libraries (DLLs) from an untrusted search path. A local attacker can place a malicious DLL in an unspecified directory, which the installer will load with elevated privileges during installation, resulting in 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<= 8.0.0.6CVSS 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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Locate Yahoo Toolbar installation directorySearch for 'Yahoo Toolbar' or 'YahooToolbar' folders in common installation paths: C:\Program Files\Yahoo!, C:\Program Files (x86)\Yahoo!, or use file explorer to search for 'YahooToolbar' keyword across the system.Affected if Yahoo Toolbar files or folders are found on the system
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Identify Yahoo Toolbar versionRight-click on YahooToolbarIE.dll or YahooTB.dll in the installation directory, select Properties, and check the File Version field. Alternatively, open the folder in Command Prompt and run 'dir /s /b *.dll | findstr -i yahoo' to list DLL files, then check version on each.Affected if File version is 8.0.0.6 or earlier, or if version cannot be determined but Yahoo Toolbar is present
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Check for Yahoo Toolbar installerSearch for Yahoo Toolbar installer executables (YahooToolbarSetup.exe, YTIEPanelSetup.exe, or similar) in Downloads folders, temp directories, or installation media. Right-click the installer and check Properties > Details for version information.Affected if Installer version is 8.0.0.6 or earlier, or installer is present on the system
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Inspect registry for installed versionOpen Registry Editor and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Yahoo! (or HKEY_CURRENT_USER\SOFTWARE\Yahoo!), look for key values containing version information or the installation path.Affected if Registry entries show version 8.0.0.6 or earlier, or Yahoo Toolbar is registered as installed with no version visible
If Yahoo Toolbar or its installer with version 8.0.0.6 or earlier is present on the system, the environment is affected by this DLL hijacking vulnerability.
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 dataUpdate to a Yahoo! Toolbar version with a timestamp after June 13, 2017 18:18:55, or uninstall the software if no patched version is available. Avoid running the installer from writable or untrusted directories.
- Consultation2.0 h
- Implementation8.0 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-2017-2253 — 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-2017-2253 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
- No spam, self-promotion, credentials, or personal data