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FirefoxWeb browser · Mozilla

CVE-2013-1684

HIGH · 9.3 CVSS v2.0 Published 2013-06-26
Fix available
A fix is available. Upgrade to after 21.0 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
Use-after-free vulnerability in the mozilla::dom::HTMLMediaElement::LookupMediaElementURITable function in Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted web site.

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

Use-after-free vulnerability in Mozilla Firefox and Thunderbird's HTMLMediaElement::LookupMediaElementURITable function allows remote attackers to execute arbitrary code or cause heap memory corruption via a crafted website. The vulnerability occurs when the browser attempts to look up a media element URI table after the memory has been freed.

MitigationUpdate affected Mozilla products (Firefox < 22.0, Firefox ESR 17.x < 17.0.7, Thunderbird < 17.0.7, Thunderbird ESR 17.x < 17.0.7) to the patched versions. Deploy via standard software update mechanisms or enterprise patch management tools.

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:<= 21.0= 19.0= 19.0.1= 19.0.2= 20.0= 20.0.1= 17.0= 17.0.1= 17.0.2= 17.0.3= 17.0.4= 17.0.5
ThunderbirdApplication
Affected:<= 17.0.6= 17.0= 17.0.1= 17.0.2= 17.0.3= 17.0.4= 17.0.5
Thunderbird EsrApplication
Affected:= 17.0= 17.0.1= 17.0.2= 17.0.3= 17.0.4= 17.0.5= 17.0.6

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
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/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. Check Firefox version on Windows
    Open Firefox, navigate to Help > About Firefox, or enter 'about:support' in the address bar to view the version number
    Affected if The version displayed is 21.0 or lower, or matches 19.0.x, 20.0.x, or 17.0.x (17.0 through 17.0.5)
  2. Check Firefox version on Linux
    Run 'firefox --version' in terminal, or check via package manager with 'rpm -q firefox' or 'dpkg -l firefox'
    Affected if The version displayed is 21.0 or lower, or matches 19.0.x, 20.0.x, or 17.0.x (17.0 through 17.0.5)
  3. Check Thunderbird version on Windows
    Open Thunderbird, navigate to Help > About Thunderbird, or enter 'about:support' in the address bar
    Affected if The version displayed is 17.0.6 or lower, or matches 17.0.x (17.0 through 17.0.5)
  4. Check Thunderbird version on Linux
    Run 'thunderbird --version' in terminal, or check via package manager with 'rpm -q thunderbird' or 'dpkg -l thunderbird'
    Affected if The version displayed is 17.0.6 or lower, or matches 17.0.x (17.0 through 17.0.5)

A user is affected if their installed Firefox version is 21.0 or below (specifically 19.x, 20.x, or 17.x), or their Thunderbird/Thunderbird ESR version is 17.0.6 or below (specifically 17.0.x).

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 21.0
Interim mitigation

Update affected Mozilla products (Firefox < 22.0, Firefox ESR 17.x < 17.0.7, Thunderbird < 17.0.7, Thunderbird ESR 17.x < 17.0.7) to the patched versions. Deploy via standard software update mechanisms or enterprise patch management tools.

Recommended fix High confidence

Firefox 22.0+; Firefox ESR 17.0.7+; Thunderbird 17.0.7+; Thunderbird ESR 17.0.7+

  1. Identify the currently installed Firefox or Thunderbird version by checking About or using 'firefox --version' / 'thunderbird --version'
  2. If running Firefox <= 21.0 or 19.x, upgrade to Firefox 22.0 or later
  3. If running Thunderbird <= 17.0.6 or 17.0-17.0.x, upgrade to Thunderbird 17.0.7 or later
  4. If running Firefox ESR 17.x, upgrade to Firefox ESR 17.0.7 or later
  5. If running Thunderbird ESR 17.x, upgrade to Thunderbird ESR 17.0.7 or later
  6. Restart the application after upgrading
  7. Verify the new version is installed correctly
Caveat Upgrading to newer major versions (e.g., from Firefox 19 to 22) may introduce compatibility issues with older extensions or plugins; test in a non-production environment first

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
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

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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-2013-1684 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