CVE-2010-2420
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 · uneditedMultiple unspecified vulnerabilities in Fenrir Inc. ActiveGeckoBrowser 1.0.0 and 1.0.5 alpha, a module for the Sleipnir web browser, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors related to the Gecko engine.
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 · low confidenceMultiple unspecified vulnerabilities in the ActiveGeckoBrowser module (versions 1.0.0 and 1.0.5 alpha) for the Sleipnir web browser allow remote attackers to crash the browser or potentially execute arbitrary code via unknown vectors in the underlying Gecko engine.
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= 1.0.0= 1.0.5CVSS 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
- Network
- Complexity
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
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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Confirm Sleipnir browser installationLocate Sleipnir installation directory - typically in Program Files on Windows. Check for sleipnir.exe or related executable.Affected if Sleipnir is installed on the system
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Identify ActiveGeckoBrowser module presenceLook for ActiveGeckoBrowser.dll or similar module files in the Sleipnir installation folder or plugin/modules subdirectory.Affected if ActiveGeckoBrowser module file exists in the Sleipnir directory
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Determine ActiveGeckoBrowser versionRight-click the ActiveGeckoBrowser DLL file, select Properties, and check the File Version tab. Alternatively, check version information within Sleipnir's plugin or module management interface if available.Affected if Version is 1.0.0 or 1.0.5 alpha
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Verify Gecko engine component versionCheck the version of the bundled Gecko engine components (such as xul.dll or similar) that ship with the ActiveGeckoBrowser module.Affected if Bundled Gecko engine is from an affected version range
The environment is affected if Sleipnir is installed with the ActiveGeckoBrowser module at version 1.0.0 or 1.0.5 alpha, as these specific versions contain the unspecified vulnerabilities in the underlying Gecko engine.
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 dataIf patches are unavailable from Fenrir Inc., consider disabling or removing the ActiveGeckoBrowser module; otherwise upgrade to any vendor-provided patched version and monitor for updates.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2010-2420 — 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-2010-2420 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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