CVE-2024-5877
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 · uneditedIrfanView PIC File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of PIC files. The issue results from the lack of proper validation of user-supplied data, which can result in a write before the start of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-23974.
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 confidenceIrfanView contains an out-of-bounds write vulnerability in its PIC file parser. The vulnerability stems from insufficient validation of user-supplied data during PIC file parsing, allowing a write operation to occur before the start of an allocated memory buffer. Successful exploitation enables an attacker to execute arbitrary code in the context of the current user process.
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<= 4.66.2CVSS 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:3.0/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 checksWork through these to decide whether this CVE applies to you.
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Verify IrfanView Formats plugin installationLocate the IrfanView installation directory and identify the formats plugin file (typically named ifp.wad or similar in a Plugins folder). Check the file properties to find its version information.Affected if The Formats plugin version is 4.66.2 or lower
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Confirm PIC file support is presentCheck the Plugins folder for the presence of PIC-related plugin files or examine the ifp.wad file to verify PIC format decoder is included.Affected if PIC file format support is loaded in IrfanView
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Determine if PIC files can be processedAttempt to open a PIC file in IrfanView or verify that .pic file extension is associated with IrfanView and recognized as a supported format.Affected if IrfanView can open and parse PIC files using the vulnerable parser
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Identify user context for PIC file handlingCheck if the current user account runs IrfanView or has processes that automatically process PIC files (e.g., thumbnail preview, file association).Affected if The current user context executes IrfanView to handle PIC files
A user is affected if they have IrfanView with the Formats plugin at version 4.66.2 or lower and process PIC files through IrfanView, allowing the out-of-bounds write to occur during parsing.
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 dataRestrict or disable use of IrfanView for untrusted PIC files until an official vendor patch is available; consider running IrfanView in a sandboxed or restricted environment to limit the impact of potential code execution.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-5877 — 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-2024-5877 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
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