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MrsidApplication · Extensis

CVE-2013-3945

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
The MrSID plugin (MrSID.dll) before 4.37 for IrfanView allows remote attackers to execute arbitrary code via a nband tag.

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

The MrSID image processing plugin (MrSID.dll) for IrfanView contains a memory corruption vulnerability in versions prior to 4.37. Attackers can exploit this by crafting a malicious MrSID image file containing a specially malformed nband tag, causing arbitrary code execution when the file is opened by a victim.

MitigationUpdate the MrSID plugin to version 4.37 or later. Avoid opening MrSID files from untrusted 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. Locate the MrSID plugin file
    Search for MrSID.dll in the IrfanView installation directory, typically under a plugins or plugins32 subfolder
    Affected if MrSID.dll file exists and is loaded by IrfanView
  2. Check MrSID plugin version
    Right-click MrSID.dll, select Properties, then view the Details tab to find the File Version field
    Affected if The displayed File Version is lower than 4.37 or the version field is empty/unavailable
  3. Verify plugin is active
    Open IrfanView, go to menu Options > Plugins. Check if the MrSID plugin is listed as loaded and enabled
    Affected if The MrSID plugin shows as loaded and enabled in the plugins list
  4. Confirm file association or recent files
    Check if .sid or other MrSID file extensions are associated with IrfanView, or review recently opened files in IrfanView for .sid/.mrsid files
    Affected if IrfanView is configured to open MrSID files or such files have been recently opened

If MrSID.dll exists with a version earlier than 4.37 and IrfanView can process MrSID files, the environment is vulnerable to this CVE.

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 to version 4.37 or later. Avoid opening MrSID files from untrusted sources until the update is applied.

Fix this in Mrsid Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

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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-2013-3945 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