CVE-2012-3973: n/a vulnerability

CVE-2012-3973: The debugger in the developer-tools subsystem in Mozilla Firefox before 15.0, when remote debugging is disa...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:21 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects Mozilla Firefox before 15.0 in a developer-tools debugger path. If the HTTPMonitor extension is present, an attacker may connect through the HTTPMonitor port even when remote debugging is disabled and execute arbitrary code. The business concern is legacy browser exposure on endpoints or packaged Linux systems, not modern supported Firefox. Exposure is most likely on obsolete systems running Firefox before 15.0 with the HTTPMonitor extension installed. Linux distributions referenced Ubuntu and SUSE advisories in 2012. Modern managed Firefox deployments are unlikely to be affected unless legacy packages or images remain in use. Prioritize remediation where legacy Firefox is still present on production workstations, jump hosts, kiosks, or gold images. The impact is high, but exposure appears narrow and tied to old software plus a specific extension condition. Mitigation focus: Upgrade Firefox to 15.0 or later where legacy installations exist.; Apply relevant Ubuntu or SUSE fixed packages from vendor advisories.; Remove or disable the HTTPMonitor extension on obsolete systems..

Prepared: Jun 28, 2026, 00:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 29, 2012, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:17039CVE reference · vdb-entry, signature
https://bugzilla.mozilla.org/show_bug.cgi?id=757128CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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