Mozilla: Heap-buffer-overflow in nsCaseTransformTextRunFactory::TransformString (MFSA 2016-85, MFSA 2016-86)
Published Sep 22, 2016
9.8
CRITICALCVSS 3.0
EPSS 3.96%
Description
Heap-based buffer overflow in the nsCaseTransformTextRunFactory::TransformString function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to cause a denial of service (boolean out-of-bounds write) or possibly have unspecified other impact via Unicode characters that are mishandled during text conversion.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox-0:45.4.0-1.el5_11
Fixed · RHSA-2016:1912
Red Hat Enterprise Linux 6
firefox-0:45.4.0-1.el6_8
Fixed · RHSA-2016:1912
Red Hat Enterprise Linux 7
firefox-0:45.4.0-1.el7_2
Fixed · RHSA-2016:1912
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:45.4.0-1.el5_11 | Fixed | RHSA-2016:1912 |
| Red Hat Enterprise Linux 6 | firefox-0:45.4.0-1.el6_8 | Fixed | RHSA-2016:1912 |
| Red Hat Enterprise Linux 7 | firefox-0:45.4.0-1.el7_2 | Fixed | RHSA-2016:1912 |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Not affected | n/a |
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.96% (0.03963) | 90.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.86% (0.03856) | 88.76th | v5 (v2026.06.15) |
| Jan 14, 2026 | 4.13% (0.04132) | 88.31th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.65% (0.02647) | 84.43th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.32% (0.09318) | 87.80th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.65% (0.02647) | 84.75th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.12% (0.03122) | 90.86th | v3 (v2023.03.01) |
| Dec 24, 2023 | 4.40% (0.04403) | 91.53th | v3 (v2023.03.01) |
| Oct 5, 2023 | 3.91% (0.03915) | 90.91th | v3 (v2023.03.01) |
| Aug 26, 2023 | 2.76% (0.02757) | 89.25th | v3 (v2023.03.01) |
| Jul 14, 2023 | 2.59% (0.02594) | 88.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.32% (0.02323) | 87.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (15)
- http://rhn.redhat.com/errata/RHSA-2016-1912.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2016/dsa-3674 vendor-advisoryx_refsource_DEBIAN
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/93049 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1036852 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2016-5270 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1291016 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1377552 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-5270
- https://security.gentoo.org/glsa/201701-15 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-5270
- https://www.mozilla.org/security/advisories/mfsa2016-85/
- https://www.mozilla.org/security/advisories/mfsa2016-86/ x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2016-88/ x_refsource_CONFIRM
Change history (0)
No recorded changes yet.