Mozilla: Sandbox escape via installation of malicious language pack
Published Jul 23, 2019
8.3
HIGHCVSS 3.1
EPSS 2.57%
Description
As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<68
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.8
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.8
- 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
- < 68.0
- < 60.8
- < 60.8
Configuration 2
- 8.0
No data.
Red Hat Enterprise Linux 6
firefox-0:60.8.0-1.el6_10
Fixed · RHSA-2019:1765
Red Hat Enterprise Linux 6
thunderbird-0:60.8.0-1.el6_10
Fixed · RHSA-2019:1777
Red Hat Enterprise Linux 7
firefox-0:60.8.0-1.el7_6
Fixed · RHSA-2019:1763
Red Hat Enterprise Linux 7
thunderbird-0:60.8.0-1.el7_6
Fixed · RHSA-2019:1775
Red Hat Enterprise Linux 8
firefox-0:60.8.0-1.el8_0
Fixed · RHSA-2019:1764
Red Hat Enterprise Linux 8
thunderbird-0:60.8.0-1.el8_0
Fixed · RHSA-2019:1799
Red Hat Enterprise Linux 5
firefox
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox-0:60.8.0-1.el6_10 | Fixed | RHSA-2019:1765 |
| Red Hat Enterprise Linux 6 | thunderbird-0:60.8.0-1.el6_10 | Fixed | RHSA-2019:1777 |
| Red Hat Enterprise Linux 7 | firefox-0:60.8.0-1.el7_6 | Fixed | RHSA-2019:1763 |
| Red Hat Enterprise Linux 7 | thunderbird-0:60.8.0-1.el7_6 | Fixed | RHSA-2019:1775 |
| Red Hat Enterprise Linux 8 | firefox-0:60.8.0-1.el8_0 | Fixed | RHSA-2019:1764 |
| Red Hat Enterprise Linux 8 | thunderbird-0:60.8.0-1.el8_0 | Fixed | RHSA-2019:1799 |
| Red Hat Enterprise Linux 5 | firefox | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:H/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 3, 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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.57% (0.02574) | 84.66th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.57% (0.02574) | 83.10th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.32% (0.01317) | 78.03th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.90% (0.02899) | 77.24th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.32% (0.01317) | 78.49th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.94% (0.01936) | 88.34th | v3 (v2023.03.01) |
| Jul 16, 2024 | 0.73% (0.00728) | 80.90th | v3 (v2023.03.01) |
| Mar 7, 2024 | 0.78% (0.00784) | 80.97th | v3 (v2023.03.01) |
| Feb 16, 2024 | 0.79% (0.00791) | 81.02th | v3 (v2023.03.01) |
| Dec 4, 2023 | 0.94% (0.00935) | 81.21th | v3 (v2023.03.01) |
| Nov 1, 2023 | 0.86% (0.00858) | 80.42th | v3 (v2023.03.01) |
| Oct 2, 2023 | 0.99% (0.00993) | 81.81th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.82% (0.00818) | 79.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.98% (0.00979) | 81.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.01% (0.18006) | 93.41th | v2 (v2022.01.01) |
| Feb 3, 2022 | 13.92% (0.13922) | 89.38th | v1 |
| Jan 6, 2022 | 13.92% (0.13922) | 89.26th | v1 |
| Jan 5, 2022 | 3.48% (0.03479) | 82.43th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.48% (0.03479) | 0.00th | v1 |
References (20)
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-9811 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538007 x_refsource_MISCIssue TrackingPermissions Required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1539598 x_refsource_MISCExploitIssue TrackingPatchVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1563327 x_refsource_MISCExploitIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1728439 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-9811
- https://security.gentoo.org/glsa/201908-12 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.gentoo.org/glsa/201908-20 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-9811
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-22/#CVE-2019-9811
- https://www.mozilla.org/security/advisories/mfsa2019-21/ x_refsource_MISCVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/ x_refsource_MISCVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/ x_refsource_MISCVendor Advisory
Change history (0)
No recorded changes yet.