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FirefoxWeb browser · Mozilla

CVE-2015-2737

HIGH · 10.0 CVSS v2.0 Published 2015-07-06
Fix available
A fix is available. Upgrade to after 38.1.0 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
The rx::d3d11::SetBufferData function in the Direct3D 11 implementation in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, and Thunderbird before 38.1 reads data from uninitialized memory locations, which has unspecified impact and attack vectors.

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 rx::d3d11::SetBufferData function in Mozilla Firefox and Thunderbird's Direct3D 11 implementation reads data from uninitialized memory locations, potentially exposing sensitive information from process memory.

MitigationUpdate to Firefox 39.0+, Firefox ESR 31.8+/38.1+, or Thunderbird 38.1+ to obtain the patched version. Alternatively, disable hardware acceleration in affected applications.

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:= 31.0= 31.1.0= 31.1.1= 31.3.0= 31.5.1= 31.5.2= 31.5.3= 38.0<= 38.1.0
Firefox EsrWeb browser
Affected:= 31.1= 31.2= 31.3= 31.4= 31.5= 31.6.0= 31.7.0
Ubuntu LinuxOperating system
Affected:= 12.04= 14.04= 14.10= 15.04
Debian LinuxOperating system
Affected:= 7.0= 8.0
SolarisOperating system
Affected:= 11.3
Linux Enterprise DesktopOperating system
Affected:= 12
Linux Enterprise ServerOperating system
Affected:= 11
Linux Enterprise Software Development KitOperating system
Affected:= 12

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. Identify installed Firefox version
    In Firefox, go to Help > About Firefox, or run: firefox --version
    Affected if Version is 31.0, 31.1.0, 31.1.1, 31.3.0, 31.5.1, 31.5.2, 31.5.3, 38.0, 38.0.5, 38.1, or 38.1.0
  2. Identify installed Firefox ESR version
    In Firefox ESR, go to Help > About Firefox, or run: firefox --version
    Affected if Version is 31.1, 31.2, 31.3, 31.4, 31.5, 31.6.0, or 31.7.0
  3. Identify installed Thunderbird version
    In Thunderbird, go to Help > About Thunderbird, or run: thunderbird --version
    Affected if Thunderbird version is 38.0 or below (the vulnerability affects Thunderbird through version 38.0)
  4. Verify if hardware acceleration is enabled
    In Firefox/Thunderbird, go to Options/Preferences > Advanced > General and check 'Use hardware acceleration when available', or inspect about:config for gfx.direct3d11.preferable = true
    Affected if Hardware acceleration is enabled and the Direct3D 11 renderer is in use (gfx.direct3d11.preferable is true)
  5. Check Windows Direct3D 11 availability
    On Windows, run dxdiag and check the Display tab to confirm Direct3D 11 feature level 11_0 is supported
    Affected if Direct3D 11 is available on the system and the application uses it for rendering

You are affected if you run Firefox 31.x/38.x, Firefox ESR 31.1-31.7, or Thunderbird 38.0 and have hardware acceleration enabled with Direct3D 11 in use.

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 38.1.0
Interim mitigation

Update to Firefox 39.0+, Firefox ESR 31.8+/38.1+, or Thunderbird 38.1+ to obtain the patched version. Alternatively, disable hardware acceleration in affected applications.

Recommended fix High confidence

Firefox 39.0+, Firefox ESR 31.8+, Firefox ESR 38.1+, or Thunderbird 38.1+ depending on the installed branch

  1. Identify the currently installed Firefox, Firefox ESR, or Thunderbird version by navigating to Help > About in the application menu
  2. For Firefox ESR users on 31.x: upgrade to Firefox ESR 31.8 or later; for Firefox ESR users on 38.x: upgrade to Firefox ESR 38.1 or later
  3. For Firefox users: upgrade to Firefox 39.0 or later
  4. For Thunderbird users: upgrade to Thunderbird 38.1 or later
  5. On Linux systems, use the system package manager (apt-get, yum, zypper) to update the package, or download the latest version from the official Mozilla website
  6. After upgrading, restart the application and verify the version in Help > About
Caveat Some older browser extensions or add-ons may not be compatible with the newer version; test critical extensions before deploying in production

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

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing8.0 h
  • Review / QA3.0 h
17.0 hours of engineering $2,860
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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-2015-2737 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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