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FirefoxWeb browser · Mozilla

CVE-2013-1735

HIGH · 9.3 CVSS v2.0 Published 2013-09-18
Fix available
A fix is available. Upgrade to after 23.0.1 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::layout::ScrollbarActivity function in Mozilla Firefox before 24.0, Firefox ESR 17.x before 17.0.9, Thunderbird before 24.0, Thunderbird ESR 17.x before 17.0.9, and SeaMonkey before 2.21 allows remote attackers to execute arbitrary code via vectors related to image-document scrolling.

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

A use-after-free vulnerability exists in the mozilla::layout::ScrollbarActivity component in Mozilla Firefox, Thunderbird, SeaMonkey, and their ESR versions. The vulnerability is triggered through scrolling operations in image documents, allowing a remote attacker to free memory that is still being referenced, leading to arbitrary code execution.

MitigationUpgrade affected products to Firefox 24.0+, Firefox ESR 17.0.9+, Thunderbird 24.0+, Thunderbird ESR 17.0.9+, or SeaMonkey 2.21+ to patch the vulnerability.

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:<= 23.0.1= 19.0= 19.0.1= 19.0.2= 20.0= 20.0.1= 21.0= 22.0= 23.0= 17.0= 17.0.1= 17.0.2
Thunderbird EsrApplication
Affected:= 17.0= 17.0.1= 17.0.2= 17.0.3= 17.0.4= 17.0.5= 17.0.6= 17.0.7= 17.0.8
SeamonkeyApplication
Affected:<= 2.20= 2.0= 2.0.1= 2.0.2= 2.0.3= 2.0.4= 2.0.5= 2.0.6= 2.0.7= 2.0.8= 2.0.9= 2.0.10
ThunderbirdApplication
Affected:<= 17.0.9= 17.0= 17.0.1= 17.0.2= 17.0.3= 17.0.4= 17.0.5= 17.0.6= 17.0.7= 17.0.8

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. Identify installed Mozilla product
    Check whether Firefox, Thunderbird, or SeaMonkey is installed by looking at the application name in Add/Remove Programs or by running: firefox --version, thunderbird --version, or seamonkey --version
    Affected if Any of these three products are installed
  2. Determine Firefox version
    In Firefox, go to Help > About Firefox or enter 'about:support' in the address bar to see the version number
    Affected if Version is 23.0.1 or lower, or matches 17.0, 17.0.1, 17.0.2, 19.0, 19.0.1, 19.0.2, 20.0, 20.0.1, 21.0, 22.0, or 23.0
  3. Determine Thunderbird version
    In Thunderbird, go to Help > About Thunderbird to see the version number
    Affected if Version is 17.0.9 or lower, or matches any of 17.0 through 17.0.8
  4. Determine SeaMonkey version
    In SeaMonkey, go to Help > About SeaMonkey to see the version number
    Affected if Version is 2.20 or lower, or matches any of 2.0 through 2.0.10
  5. Verify trigger condition - image document viewing
    The vulnerability is triggered specifically when scrolling within an image document (such as a large image opened directly in the browser). Check if users in your environment open images directly in the browser rather than in external viewers
    Affected if Users view image documents directly in the browser and scroll through them

Your environment is affected if any installed Mozilla product matches the version ranges above AND users view and scroll through image documents directly in the browser.

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 23.0.1
Interim mitigation

Upgrade affected products to Firefox 24.0+, Firefox ESR 17.0.9+, Thunderbird 24.0+, Thunderbird ESR 17.0.9+, or SeaMonkey 2.21+ to patch the vulnerability.

Recommended fix High confidence

Firefox 24.0+, Firefox ESR 17.0.9+, Thunderbird 24.0+, Thunderbird ESR 17.0.9+, or SeaMonkey 2.21+

  1. 1. Identify the installed Mozilla product (Firefox, Thunderbird, or SeaMonkey) and current version by checking About/Help menu
  2. 2. For Firefox: Upgrade to version 24.0 or later
  3. 3. For Firefox ESR 17.x: Upgrade to version 17.0.9
  4. 4. For Thunderbird: Upgrade to version 24.0 or later
  5. 5. For Thunderbird ESR 17.x: Upgrade to version 17.0.9
  6. 6. For SeaMonkey: Upgrade to version 2.21 or later
  7. 7. Restart the application after upgrade
  8. 8. Verify the installed version matches or exceeds the fixed release
Caveat Minor: Some legacy extension compatibility may be affected in newer major versions; test critical workflows after upgrade

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
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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-2013-1735 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