CVE-2018-18512
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 · uneditedA use-after-free vulnerability can occur while playing a sound notification in Thunderbird. The memory storing the sound data is immediately freed, although the sound is still being played asynchronously, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5.
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 in Thunderbird allows memory containing sound notification data to be freed while the sound continues playing asynchronously, leading to a potentially exploitable crash.
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< 65.0CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
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Check installed Thunderbird versionRun 'thunderbird --version' in terminal or access Help > About Thunderbird in the application menuAffected if Version displayed is below 65.0 (e.g., 60.x, 64.x)
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Verify version via package managerQuery your system's package manager: dpkg -l | grep thunderbird (Debian/Ubuntu), rpm -qi thunderbird (RHEL/CentOS), or pacman -Qi thunderbird (Arch)Affected if Package version listed is less than 65.0
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Identify sound notification configurationCheck Thunderbird account settings for notification preferences or inspect pref files in profile directory for sounds.enabled or mail.biff.play_sound settingsAffected if Sound notifications are enabled and configured to play on new mail
You are affected if Thunderbird is installed with a version lower than 65.0 and sound notifications are enabled, as the use-after-free occurs when sound notification data is freed while playback is still ongoing.
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.
dbcve · scoped65.0
Upgrade Thunderbird to version 60.5 or later to remediate this vulnerability.
Thunderbird 65.0 or later
- 1. Back up your Thunderbird profile (email settings, local folders, add-ons) to prevent data loss
- 2. Close Thunderbird completely if it's currently running
- 3. Download Thunderbird 65.0 or later from the official Mozilla Thunderbird website (www.thunderbird.net)
- 4. Run the installer and follow the prompts to upgrade your existing installation
- 5. After installation, launch Thunderbird and verify that sound notifications work correctly
- 6. Re-enable any previously disabled add-ons and confirm they function properly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,832.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-18512 — 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 sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-18512 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
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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
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