Mozilla: HTTPMonitor extension allows for remote debugging without explicit activation (MFSA 2012-66)
Published Aug 29, 2012
7.6
HIGHCVSS 2.0
EPSS 4.93%
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.
Affected products
No data.
- ≤ 14.0
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.4.1
- 1.5
- 1.5
- 1.5
- 1.5.0.1
- 1.5.0.2
- 1.5.0.3
- 1.5.0.4
- 1.5.0.5
- 1.5.0.6
- 1.5.0.7
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 1.5.0.11
- 1.5.0.12
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.8
- 2.0
- 2.0.0.1
- 2.0.0.2
- 2.0.0.3
- 2.0.0.4
- 2.0.0.5
- 2.0.0.6
- 2.0.0.7
- 2.0.0.8
- 2.0.0.9
- 2.0.0.10
- 2.0.0.11
- 2.0.0.12
- 2.0.0.13
- 2.0.0.14
- 2.0.0.15
- 2.0.0.16
- 2.0.0.17
- 2.0.0.18
- 2.0.0.19
- 2.0.0.20
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.15
- 3.0.16
- 3.0.17
- 3.5
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
- 3.5.5
- 3.5.6
- 3.5.7
- 3.5.8
- 3.5.9
- 3.5.10
- 3.5.11
- 3.5.12
- 3.5.13
- 3.5.14
- 3.5.15
- 3.6
- 3.6.2
- 3.6.3
- 3.6.4
- 3.6.6
- 3.6.7
- 3.6.8
- 3.6.9
- 3.6.10
- 3.6.11
- 3.6.12
- 3.6.13
- 3.6.14
- 3.6.15
- 3.6.16
- 3.6.17
- 3.6.18
- 3.6.19
- 3.6.20
- 3.6.21
- 3.6.22
- 3.6.23
- 3.6.24
- 3.6.25
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0.1
- 5.0
- 5.0.1
- 6.0
- 6.0.1
- 6.0.2
- 7.0
- 7.0.1
- 8.0
- 8.0.1
- 9.0
- 9.0.1
- 10.0
- 10.0.1
- 10.0.2
- 11.0
- 12.0
- 12.0
- 13.0
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of Firefox and Thunderbird package, as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.93% (0.04931) | 91.86th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.93% (0.04931) | 90.99th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.05% (0.03046) | 85.47th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.16% (0.10162) | 88.44th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.05% (0.03046) | 85.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 5.01% (0.05009) | 93.16th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.01% (0.05009) | 91.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 9.92% (0.09915) | 94.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 9.92% (0.09915) | 94.04th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.92% (0.09915) | 87.53th | v2 (v2022.01.01) |
References (14)
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html vendor-advisoryx_refsource_SUSE
- http://osvdb.org/85005 vdb-entryx_refsource_OSVDB
- http://www.mozilla.org/security/announce/2012/mfsa2012-66.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/55308 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1548-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-1548-2 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2012-3973 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=757128 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=851925 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-3973
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17039 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2012-3973
Change history (0)
No recorded changes yet.