CVE-2009-2294
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 · uneditedInteger overflow in the Png_datainfo_callback function in Dillo 2.1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a PNG image with crafted (1) width or (2) height values.
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 · moderate confidenceInteger overflow vulnerability in Dillo 2.1 and earlier web browser's PNG image processing. The Png_datainfo_callback function fails to properly validate width and height values from PNG image headers, allowing specially crafted images with extreme dimension values to trigger overflow conditions leading to denial of service or potential arbitrary code execution.
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<= 2.1= 0.0.0= 0.0.1= 0.0.2= 0.0.3= 0.0.4= 0.0.5= 0.0.6= 0.0.42= 0.0.43= 0.1.0= 0.2CVSS 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
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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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Confirm Dillo browser is installedRun 'which dillo' or 'dillo --version' to locate and identify the Dillo installationAffected if Dillo is not found, the system is not affected by this specific CVE
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Determine installed Dillo versionExecute 'dillo --version' and compare the output against the affected versions (any version <= 2.1, including 0.0.0-0.0.6, 0.0.42, 0.0.43, 0.1.0, and 0.2)Affected if The installed version is 2.1 or earlier, meaning the vulnerability is present in the binary
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Verify PNG image support is enabledCheck if Dillo was compiled with PNG support (look for libpng dependency in 'ldd $(which dillo)' or check Dillo's configure options)Affected if PNG support is compiled in and the browser is used to render PNG images from untrusted sources
A user is affected if Dillo version 2.1 or earlier is installed with PNG image processing enabled and the browser is used to view PNG images from potentially untrusted sources.
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 dataUpgrade to a patched version of Dillo if available; otherwise, avoid processing untrusted PNG images in Dillo browsers. Implementing proper bounds checking on width/height values before use in memory allocation or arithmetic operations will remediate the integer overflow.
- Consultation3.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2009-2294 — 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-2009-2294 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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- Version or environment caveats, and links to real fixes
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