CVE-2019-11757
HIGHFirefox < 70, Thunderbird < 68.2, Firefox ESR < 68.2 - Use After Free
Title source: llmDescription
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
References (6)
Core 6
Core References
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2019-35/
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2019-33/
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2019-34/
Issue Tracking, Permissions Required x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=1577107
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202003-10
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/
Scores
CVSS v3
8.8
EPSS
0.0158
EPSS Percentile
81.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-416
Status
published
Products (4)
canonical/ubuntu_linux
16.04
mozilla/firefox
< 70.0
mozilla/firefox_esr
< 68.2
mozilla/thunderbird
< 68.2
Published
Jan 08, 2020
Tracked Since
Feb 18, 2026