THREATPORT/VULNERABILITY/CVE-2012-3973
HIGH SEVERITY

CVE-2012-3973

Firefox vulnerability

CVSS
7.6
EPSS
4.9%
EPSS pct
91th
Exploited
No known
The debugger in the developer-tools subsystem in Mozilla Firefox before 15.0, when remote debugging is disabled, does not properly restrict access to the remote-debugging service, which allows remote attackers to execute arbitrary code by leveraging the presence of the HTTPMonitor extension and connecting to that service through the HTTPMonitor port.
Affected vendor
Mozilla
Affected product
Firefox
CVSS vector
AV:N/AC:H/Au:N/C:C/I:C/A:C
Weakness type (CWE)
  • CWE-264 — Permissions, Privileges, and Access Controls
Published
2012-08-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 4.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2012-3973

  • Confirm whether Mozilla Firefox is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2012-3973.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-3973

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2012-3973 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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