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FirefoxWeb browser · Mozilla

CVE-2015-4504

MEDIUM · 6.4 CVSS v2.0 Published 2015-09-24
Fix available
A fix is available. Upgrade to after 40.0.3 or later.
See remediation →
73/100
Remediation priority · Elevated
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
The lut_inverse_interp16 function in the QCMS library in Mozilla Firefox before 41.0 allows remote attackers to obtain sensitive information or cause a denial of service (buffer over-read and application crash) via crafted attributes in the ICC 4 profile of an image.

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

The lut_inverse_interp16 function in Mozilla Firefox's QCMS color management library contains a buffer over-read vulnerability when parsing ICC 4 profile attributes. Crafted malicious ICC profiles can trigger out-of-bounds memory reads, leading to potential information disclosure or application crashes.

MitigationUpgrade Mozilla Firefox to version 41.0 or later, which contains the patched QCMS library code that properly validates buffer boundaries when processing ICC 4 profile attributes.

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:<= 40.0.3

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
Partial
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check installed Firefox version
    Open Firefox, click the menu button (three horizontal lines), select Help, then About Firefox. The version number is displayed at the top of the dialog.
    Affected if The version displayed is 40.0.3 or any earlier version (for example, 40.0.2, 40.0, 39.0, etc.)
  2. Confirm QCMS color management is in use
    The QCMS library is built into Firefox for ICC profile processing. No separate configuration check is needed - this is a core component used whenever Firefox handles color profiles.
    Affected if Firefox is installed and processes ICC profiles (this is default behavior; the vulnerability exists in the built-in QCMS library code for affected versions)

If Firefox version is 40.0.3 or earlier, the environment is vulnerable to the buffer over-read in the QCMS library when processing malicious ICC 4 profile attributes.

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.

From vendor data
Upgrade available Upgrade to a release after 40.0.3
Interim mitigation

Upgrade Mozilla Firefox to version 41.0 or later, which contains the patched QCMS library code that properly validates buffer boundaries when processing ICC 4 profile attributes.

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.

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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-2015-4504 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