FirefoxWeb browser · Mozilla
CVE-2015-0813
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 · uneditedUse-after-free vulnerability in the AppendElements function in Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 on Linux, when the Fluendo MP3 plugin for GStreamer is used, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted MP3 file.
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 confidenceA use-after-free vulnerability exists in the AppendElements function in Firefox and Thunderbird on Linux when the Fluendo MP3 plugin for GStreamer is present. When a user opens a specially crafted MP3 file, the vulnerability causes heap memory corruption that can be exploited for 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
FirefoxWeb browser
<= 31.5.3<= 36.0.4<= 31.5CVSS 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
- High
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:H/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.
-
Confirm you are running on LinuxRun 'uname -a' or check your operating system. This vulnerability only affects Linux systems.Affected if The system is not Linux - the flaw does not apply to Windows or macOS.
-
Identify installed Firefox versionIn Firefox, go to Help > About Firefox, or run 'firefox --version' from command line. Note the exact version number.Affected if The version is 31.5.3 or earlier, or 36.0.4 or earlier.
-
Identify installed Thunderbird versionIn Thunderbird, go to Help > About Thunderbird, or run 'thunderbird --version' from command line. Note the exact version number.Affected if The version is 31.5 or earlier (if Firefox is not the product in use).
-
Check for Fluendo MP3 plugin presenceLook for the Fluendo MP3 plugin in the GStreamer plugin directory, typically /usr/lib/gstreamer-0.10/libgstfluenomp3.so or similar path under /usr/lib/gstreamer*. You can also run 'gst-inspect-0.10 fluenomp3' or search for 'fluendo' in the plugin list.Affected if The Fluendo MP3 plugin for GStreamer is installed and present on the system.
You are affected if you are running Firefox <= 31.5.3 or <= 36.0.4, or Thunderbird <= 31.5, on Linux, and the Fluendo MP3 plugin for GStreamer is installed.
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 dataUpdate Firefox to 37.0+, Firefox ESR to 31.6+, or Thunderbird to 31.6+; alternatively, disable or remove the Fluendo MP3 plugin for GStreamer on Linux systems.
Fix this in Firefox
Scoped from the published advisory
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-0813 — 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 sources- www.mozilla.org
- lists.opensuse.org
- lists.opensuse.org
- lists.opensuse.org
- lists.opensuse.org
- rhn.redhat.com
- rhn.redhat.com
- www.debian.org
- www.debian.org
- www.oracle.com
- www.securityfocus.com
- www.securitytracker.com
- www.securitytracker.com
- www.ubuntu.com
- www.ubuntu.com
- bugzilla.mozilla.org
- security.gentoo.org
- nvd.nist.gov
Practitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2015-0813 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
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.
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.
- 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