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MrsidApplication · Extensis

CVE-2013-3946

HIGH · 7.8 CVSS v3.1 Published 2020-01-02
Fix available
A fix is available. Upgrade to 4.37 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
Heap-based buffer overflow in the MrSID plugin (MrSID.dll) before 4.37 for IrfanView allows remote attackers to execute arbitrary code via a levels header.

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

Heap-based buffer overflow vulnerability in the MrSID image plugin (MrSID.dll) for IrfanView versions prior to 4.37. The overflow occurs when parsing a specially crafted 'levels header' in MrSID image files, allowing attackers to execute arbitrary code via heap corruption.

MitigationUpdate the MrSID plugin (MrSID.dll) to version 4.37 or later. Users should only open MrSID image files from trusted sources until the update is applied.

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
MrsidApplication
Affected:< 4.37

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. Check IrfanView version
    Open IrfanView, go to Help > About, or run 'irfanview.exe /?' from command line to display version information
    Affected if Version is prior to 4.37 and MrSID plugin is in use
  2. Locate MrSID.dll plugin
    Navigate to the IrfanView plugins folder (typically C:\Program Files\IrfanView\Plugins or C:\Program Files (x86)\IrfanView\Plugins) and locate MrSID.dll
    Affected if MrSID.dll file exists in the plugins folder
  3. Check MrSID.dll version
    Right-click MrSID.dll, select Properties, then go to the Details tab to view the File Version
    Affected if File version is earlier than 4.37 or the version field is blank/unavailable and the file is from an older IrfanView installation
  4. Identify if MrSID image files are being processed
    Search for .sid or .mrsid file extensions on the system, or check recent file history for these file types opened with IrfanView
    Affected if User has opened or intends to open MrSID (.sid/.mrsid) image files using the affected plugin version

User is affected if IrfanView version is below 4.37 AND MrSID.dll version is below 4.37 AND the user opens MrSID image files with this plugin enabled.

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.

From vendor data
Upgrade available Upgrade to 4.37 or later
Fixed in 4.37
Interim mitigation

Update the MrSID plugin (MrSID.dll) to version 4.37 or later. Users should only open MrSID image files from trusted sources until the update is applied.

Fix this in Mrsid Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

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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-2013-3946 in production — separate from our analysis above.

No notes yet

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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