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FirefoxWeb browser · Mozilla

CVE-2015-0811

MEDIUM · 6.4 CVSS v2.0 Published 2015-04-01
Fix available
A fix is available. Upgrade to after 36.0.4 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 QCMS implementation in Mozilla Firefox before 37.0 allows remote attackers to obtain sensitive information from process heap memory or cause a denial of service (out-of-bounds read) via an image that is improperly handled during transformation.

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 before version 37.0 contains an out-of-bounds read vulnerability in the QCMS color management library. When processing specially crafted images during transformation, the library reads beyond allocated memory boundaries, allowing remote attackers to potentially leak heap memory contents or crash the browser.

MitigationUpdate Firefox to version 37.0 or later to obtain the vendor patch addressing this QCMS vulnerability. This is a client-side vulnerability requiring browser updates on affected systems.

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:<= 36.0.4
Ubuntu LinuxOperating system
Affected:= 12.04= 14.04= 14.10
OpensuseOperating system
Affected:= 13.1= 13.2

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, go to Help > About Firefox, or type 'about:support' in the address bar, or run 'firefox --version' from command line
    Affected if The displayed version is 36.0.4 or earlier (any version below 37.0)
  2. Check Firefox package version on Linux
    Run 'dpkg -l | grep firefox' (Ubuntu) or 'rpm -qa | grep firefox' (OpenSUSE) to query the installed Firefox package version
    Affected if The package version is 36.0.4 or earlier
  3. Confirm QCMS library presence
    The QCMS library (libqcms.so or similar) is bundled within Firefox - no separate check needed; it is present in all Firefox installations using the QCMS color management feature
    Affected if Firefox uses QCMS for color management (default in affected versions)

You are affected if your installed Firefox version is 36.0.4 or any earlier version; update to 37.0 or later to resolve this out-of-bounds read vulnerability in the QCMS library.

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 36.0.4
Interim mitigation

Update Firefox to version 37.0 or later to obtain the vendor patch addressing this QCMS vulnerability. This is a client-side vulnerability requiring browser updates on affected systems.

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.

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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-2015-0811 in production — separate from our analysis above.

No notes yet

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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