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FirefoxWeb browser · Mozilla

CVE-2008-4064

HIGH · 10.0 CVSS v2.0 Published 2008-09-24
Fix available
A fix is available. Upgrade to after 3.0.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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
Multiple unspecified vulnerabilities in Mozilla Firefox 3.x before 3.0.2 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to graphics rendering and (1) handling of a long alert messagebox in the cairo_surface_set_device_offset function, (2) integer overflows when handling animated PNG data in the info_callback function in nsPNGDecoder.cpp, and (3) an integer overflow when handling SVG data in the nsSVGFEGaussianBlurElement::SetupPredivide function in nsSVGFilters.cpp.

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

Mozilla Firefox 3.x before 3.0.2 contains three memory corruption vulnerabilities in graphics rendering: (1) cairo_surface_set_device_offset handling long alert messageboxes, (2) integer overflows in nsPNGDecoder.cpp when processing animated PNG data, and (3) integer overflow in nsSVGFEGaussianBlurElement::SetupPredivide when handling SVG data. Remote attackers can cause denial of service or potentially execute arbitrary code via malicious web content.

MitigationUpgrade to Firefox 3.0.2 or later. If unable to upgrade immediately, disable JavaScript and restrict browsing to trusted sites only, as the attack vectors involve web-based content processing through graphics libraries.

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
FirefoxWeb browser
Affected:<= 3.0.1= 3.0

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
Network
Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:N/C:C/I:C/A:C

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. Check installed Firefox version
    Navigate to Help > About Firefox, or enter 'about:config' in the address bar to view version information. Alternatively, run 'firefox --version' from command line.
    Affected if Version is 3.0 or 3.0.1 (any 3.x version before 3.0.2)
  2. Confirm SVG rendering capability is enabled
    Attempt to load a simple SVG file or visit a page containing SVG content. Check that Firefox renders vector graphics without error.
    Affected if SVG content renders successfully - the vulnerable nsSVGFEGaussianBlurElement code path is active
  3. Confirm PNG image handling is active
    Load a web page containing PNG images, or attempt to view a PNG file directly in the browser.
    Affected if PNG images display normally - the vulnerable nsPNGDecoder code path is active
  4. Verify graphics rendering via alert dialogs works
    Open any webpage that triggers a JavaScript alert(), confirm the dialog appears and the window renders correctly.
    Affected if Alert dialogs display properly - the vulnerable cairo_surface_set_device_offset code path is active

If Firefox version is 3.0 or 3.0.1 AND graphics/SVG/PNG features are functional (default state), the environment is vulnerable to the described memory corruption flaws.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 3.0.1
Interim mitigation

Upgrade to Firefox 3.0.2 or later. If unable to upgrade immediately, disable JavaScript and restrict browsing to trusted sites only, as the attack vectors involve web-based content processing through graphics libraries.

Recommended fix High confidence

Firefox 3.0.2

  1. 1. Check current Firefox version via Help > About Mozilla Firefox or running 'firefox --version' in command line
  2. 2. If version is 3.0 or 3.0.1 (or any version <= 3.0.1), the system is vulnerable
  3. 3. Download Firefox 3.0.2 or later from the official Mozilla repository (mozilla.org)
  4. 4. Install the Firefox 3.0.2 upgrade following standard installation procedures
  5. 5. After installation, restart Firefox to apply the update
  6. 6. Verify the upgrade was successful by checking Help > About shows version 3.0.2 or higher
Caveat Minor point release; verify any legacy browser extensions are compatible with 3.0.2

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Firefox Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing10.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,580
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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-2008-4064 in production — separate from our analysis above.

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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