Security readout for executives and security teams
Plain-English summary
CVE-2017-9920 concerns legacy IrfanView 4.44 32-bit installations using TOOLS Plugin 4.50. A maliciously crafted file might crash the application or potentially run attacker-controlled code. The public record does not provide severity scoring, confirmed exploitation, or a named fixed version.
Executive priority
Handle this as a legacy endpoint hygiene issue unless inventory shows meaningful use in exposed file-handling workflows. Absence of severity data and KEV listing lowers certainty, but possible code execution warrants removing or updating affected installations where found.
Technical view
The CVE describes control of branch selection from data at a faulting address inside Windows loader resource-search logic when IrfanView 4.44 32-bit with TOOLS Plugin 4.50 processes a crafted file. The disclosed impact is denial of service or possible arbitrary code execution; root cause details and affected-version range are incomplete.
Likely exposure
Exposure is likely limited to workstations or workflows that still use IrfanView 4.44 32-bit with TOOLS Plugin 4.50, especially where users open images or files received from email, downloads, ticket attachments, or shared folders.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. The attack condition is interaction with a crafted file. Public evidence is sparse and should not be treated as proof of broad exploitation.
Researcher notes
The record is incomplete: no CVSS, CWE, CPE, affected-version range, or vendor fix is provided in the bundle. Preserve the exact product tuple from the CVE and avoid expanding impact beyond IrfanView 4.44 32-bit with TOOLS Plugin 4.50.
Mitigation direction
- Inventory IrfanView installations and identify version 4.44 32-bit with TOOLS Plugin 4.50.
- Check IrfanView and plugin vendor guidance for fixed versions or removal guidance.
- Remove or disable the TOOLS Plugin where it is not operationally required.
- Restrict opening untrusted files in vulnerable IrfanView installations.
- Prioritize replacement of legacy image viewers on managed endpoints.
Validation and detection
- Confirm installed IrfanView version, architecture, and plugin versions on endpoints.
- Identify users or systems that open externally supplied files with IrfanView.
- Review EDR or crash telemetry for IrfanView faults tied to untrusted files.
- Verify whether vendor guidance names a patched version for this plugin issue.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-9920 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-9920CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.