Mozilla: Use-after-free working with events in FontFace objects (MFSA 2017-06)
Published Jun 11, 2018
9.8
CRITICALCVSS 3.0
EPSS 2.90%
Description
A use-after-free can occur when events are fired for a "FontFace" object after the object has been already been destroyed while working with fonts. This results in a potentially exploitable crash. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<52
- Version
-
- Version unspecifiedStatusaffectedConstraints<45.8
- Version
-
- Version unspecifiedStatusaffectedConstraints<45.8
- Version unspecifiedStatusaffectedConstraints<52
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox | n/a |
| |||||||||
| Mozilla | Firefox ESR | n/a |
| |||||||||
| Mozilla | Thunderbird | n/a |
|
Configuration 1
- 9.0
Configuration 2
- 5.0
- 6.0
- 7.0
- 5.0
- 6.0
- 7.0
- 5.0
- 6.0
- 7.0
- 7.3
- 7.4
- 7.3
- 7.4
- 7.5
- 5.0
- 6.0
- 7.0
Configuration 3
- < 45.8.0
No data.
Red Hat Enterprise Linux 5
firefox-0:45.8.0-2.el5_11
Fixed · RHSA-2017:0459
Red Hat Enterprise Linux 5
thunderbird-0:45.8.0-1.el5_11
Fixed · RHSA-2017:0498
Red Hat Enterprise Linux 6
firefox-0:45.8.0-2.el6_8
Fixed · RHSA-2017:0459
Red Hat Enterprise Linux 6
thunderbird-0:45.8.0-1.el6_8
Fixed · RHSA-2017:0498
Red Hat Enterprise Linux 7
firefox-0:52.0-4.el7_3
Fixed · RHSA-2017:0461
Red Hat Enterprise Linux 7
thunderbird-0:45.8.0-1.el7_3
Fixed · RHSA-2017:0498
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:45.8.0-2.el5_11 | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux 5 | thunderbird-0:45.8.0-1.el5_11 | Fixed | RHSA-2017:0498 |
| Red Hat Enterprise Linux 6 | firefox-0:45.8.0-2.el6_8 | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux 6 | thunderbird-0:45.8.0-1.el6_8 | Fixed | RHSA-2017:0498 |
| Red Hat Enterprise Linux 7 | firefox-0:52.0-4.el7_3 | Fixed | RHSA-2017:0461 |
| Red Hat Enterprise Linux 7 | thunderbird-0:45.8.0-1.el7_3 | Fixed | RHSA-2017:0498 |
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.90% (0.02898) | 86.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.94% (0.02935) | 85.26th | v5 (v2026.06.15) |
| Jun 14, 2025 | 3.15% (0.03145) | 86.26th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.14% (0.05140) | 88.88th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.51% (0.09507) | 87.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.23% (0.05234) | 89.24th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.60% (0.00596) | 79.10th | v3 (v2023.03.01) |
| Mar 21, 2024 | 0.59% (0.00588) | 77.78th | v3 (v2023.03.01) |
| Dec 12, 2023 | 0.59% (0.00588) | 75.77th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.64% (0.00635) | 76.82th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.70% (0.00696) | 77.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.55% (0.00552) | 74.03th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.08% (0.03080) | 65.20th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.08% (0.03080) | 0.00th | v1 |
References (19)
- http://rhn.redhat.com/errata/RHSA-2017-0459.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0461.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0498.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/96664 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037966 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-5402 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1334876 x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1429780 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-5402
- https://security.gentoo.org/glsa/201705-06 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.gentoo.org/glsa/201705-07 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-5402
- https://www.debian.org/security/2017/dsa-3805 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.debian.org/security/2017/dsa-3832 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-06/#CVE-2017-5402
- https://www.mozilla.org/security/advisories/mfsa2017-05/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-06/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-07/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-09/ x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.