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.
https://bugzilla.mozilla.org/show_bug.cgi?id=1538007
https://www.mozilla.org/security/advisories/mfsa2019-21/
https://bugzilla.mozilla.org/show_bug.cgi?id=1563327
https://www.mozilla.org/security/advisories/mfsa2019-22/
https://bugzilla.mozilla.org/show_bug.cgi?id=1539598
https://www.mozilla.org/security/advisories/mfsa2019-23/
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html
https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
https://security.gentoo.org/glsa/201908-12
https://security.gentoo.org/glsa/201908-20
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
Source: MITRE
Published: 2019-07-23
Updated: 2023-02-28
Type: CWE-74
Base Score: 5.1
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 4.9
Severity: MEDIUM
Base Score: 8.3
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 1.6
Severity: HIGH