Mozilla: Certificate parsing broken by non-standard character encoding (MFSA 2014-65)
Published Jul 23, 2014
4.3
MEDIUMCVSS 2.0
EPSS 1.17%
Description
Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use UTF-8 character encoding in a required context, a different vulnerability than CVE-2014-1559.
Affected products
No data.
- ≤ 30.0
- ≤ 24.7
- 24.0
- 24.0.1
- 24.1
- 24.1.1
- 24.2
- 24.3
- 24.4
- 24.5
- 24.6
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 thunderbird as shipped with Red Hat Enterprise Linux 5 and 6, or the version of firefox as shipped with Red Hat Enterprise Linux 5, 6, and 7.
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:M/Au:N/C:N/I:N/A:P
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.17% (0.01171) | 66.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.17% (0.01171) | 63.22th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.55% (0.00551) | 65.35th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.78% (0.01777) | 71.44th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.55% (0.00551) | 66.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.76% (0.01764) | 88.49th | v3 (v2023.03.01) |
| Mar 4, 2024 | 1.76% (0.01764) | 87.63th | v3 (v2023.03.01) |
| Jan 17, 2024 | 1.99% (0.01994) | 87.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.98% (0.01981) | 86.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
No CWE recorded.
References (10)
- http://secunia.com/advisories/60628 third-party-advisoryx_refsource_SECUNIA
- http://www.mozilla.org/security/announce/2014/mfsa2014-65.html x_refsource_CONFIRMVendor Advisory
- http://www.securitytracker.com/id/1030619 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1030620 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2014-1558 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1015973 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1121480 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2014-1558
- https://security.gentoo.org/glsa/201504-01 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2014-1558
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/60628 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.mozilla.org/security/announce/2014/mfsa2014-65.html | x_refsource_CONFIRMVendor Advisory | |
| http://www.securitytracker.com/id/1030619 | vdb-entryx_refsource_SECTRACK | |
| http://www.securitytracker.com/id/1030620 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2014-1558 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1015973 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1121480 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2014-1558 | ||
| https://security.gentoo.org/glsa/201504-01 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2014-1558 |
Change history (0)
No recorded changes yet.