CVE-2013-3944

Code execution via malformed IMAGE tag

Published Jan 2, 2020 · Updated Aug 6, 2024

Stack-based buffer overflow in IrfanView MR-SID PlugIn before 4.37 allows remote attackers to execute arbitrary code via a crafted SID file. MrSID.dll improperly validates the IMAGE tag while parsing SID image data, allowing attacker-controlled data to overflow a stack buffer. Execution requires a user to open the crafted image, and resulting code runs in the IrfanView process under that user's account.

CVSS severity7.8
High
EPSS probability27.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in IrfanView MR-SID PlugIn before 4.37 allows remote attackers to execute arbitrary code via a crafted SID file. MrSID.dll improperly validates the IMAGE tag while parsing SID image data, allowing attacker-controlled data to overflow a stack buffer. Execution requires a user to open the crafted image, and resulting code runs in the IrfanView process under that user's account.

The record

CVE
CVE-2013-3944
Published
Jan 2, 2020
Updated
Aug 6, 2024
Vendor
IrfanView Software
Product
IrfanView MR-SID PlugIn
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 4.37

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IrfanView Software · IrfanView MR-SID PlugInversion=before 4.37

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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