HIGH
Mozilla mObserverList use after free (MFSA 2011-13)
Published May 7, 2011
10.0
HIGHCVSS 2.0
EPSS 4.78%
Description
Use-after-free vulnerability in Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, allows remote attackers to execute arbitrary code via vectors related to OBJECT's mObserverList.
Affected products
No data.
Configuration 1
OR
- 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
Configuration 2
OR
- ≤ 2.0.13
- 1.0
- 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
- 1.0.9
- 1.1
- 1.1
- 1.1
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.1.6
- 1.1.7
- 1.1.8
- 1.1.9
- 1.1.10
- 1.1.11
- 1.1.12
- 1.1.13
- 1.1.14
- 1.1.15
- 1.1.16
- 1.1.17
- 1.1.18
- 1.1.19
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 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
- 2.0.11
- 2.0.12
Configuration 3
OR
- ≤ 3.5.18
- 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
- 1.5
- 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
- 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
- 3.5.16
- 3.5.17
No data.
Red Hat Enterprise Linux 4
firefox-0:3.6.17-2.el4
Fixed · RHSA-2011:0471
Red Hat Enterprise Linux 5
firefox-0:3.6.17-1.el5_6
Fixed · RHSA-2011:0471
Red Hat Enterprise Linux 5
xulrunner-0:1.9.2.17-3.el5_6
Fixed · RHSA-2011:0471
Red Hat Enterprise Linux 6
firefox-0:3.6.17-1.el6_0
Fixed · RHSA-2011:0471
Red Hat Enterprise Linux 6
xulrunner-0:1.9.2.17-4.el6_0
Fixed · RHSA-2011:0471
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | firefox-0:3.6.17-2.el4 | Fixed | RHSA-2011:0471 |
| Red Hat Enterprise Linux 5 | firefox-0:3.6.17-1.el5_6 | Fixed | RHSA-2011:0471 |
| Red Hat Enterprise Linux 5 | xulrunner-0:1.9.2.17-3.el5_6 | Fixed | RHSA-2011:0471 |
| Red Hat Enterprise Linux 6 | firefox-0:3.6.17-1.el6_0 | Fixed | RHSA-2011:0471 |
| Red Hat Enterprise Linux 6 | xulrunner-0:1.9.2.17-4.el6_0 | Fixed | RHSA-2011:0471 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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.
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.78% 0.04780
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.04780
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.78% (0.04780) | 91.64th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.74% (0.04736) | 90.67th | v5 (v2026.06.15) |
| Nov 6, 2025 | 5.40% (0.05403) | 89.67th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.22% (0.04219) | 87.69th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.16% (0.20164) | 92.66th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.22% (0.04219) | 88.00th | v4 (v2025.03.14) |
| Dec 12, 2024 | 10.74% (0.10741) | 95.34th | v3 (v2023.03.01) |
| May 23, 2024 | 10.74% (0.10741) | 95.08th | v3 (v2023.03.01) |
| Jul 20, 2023 | 12.03% (0.12026) | 94.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 10.81% (0.10810) | 94.13th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.26% (0.08263) | 93.54th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.26% (0.08263) | 92.94th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.26% (0.08263) | 82.29th | v2 (v2022.01.01) |
Weaknesses (2)
References (12)
- http://downloads.avaya.com/css/P8/documents/100144158 x_refsource_CONFIRM
- http://www.debian.org/security/2011/dsa-2227 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2011/dsa-2228 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2011/dsa-2235 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:079 vendor-advisoryx_refsource_MANDRIVA
- http://www.mozilla.org/security/announce/2011/mfsa2011-13.html x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2011-0066 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=634983 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=700657 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-0066
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13970 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-0066
| Link | Providers | Tags |
|---|---|---|
| http://downloads.avaya.com/css/P8/documents/100144158 | x_refsource_CONFIRM | |
| http://www.debian.org/security/2011/dsa-2227 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.debian.org/security/2011/dsa-2228 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.debian.org/security/2011/dsa-2235 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2011:079 | vendor-advisoryx_refsource_MANDRIVA | |
| http://www.mozilla.org/security/announce/2011/mfsa2011-13.html | x_refsource_CONFIRMVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-0066 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=634983 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=700657 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-0066 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13970 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2011-0066 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published May 7, 2011
Updated Aug 6, 2024
Reserved Dec 21, 2010
Link CVE-2011-0066
CISA Vulnrichment
Updated n/a