Description
By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
References (7)
Core 7
Core References
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-08/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-10/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-09/
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1612308
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4328-1/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/
Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html
Scores
CVSS v3
8.8
EPSS
0.0261
EPSS Percentile
85.8%
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-125
Status
published
Products (6)
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
mozilla/firefox
< 74.0
mozilla/firefox_esr
< 68.6.0
mozilla/thunderbird
< 68.6.0
Published
Mar 25, 2020
Tracked Since
Feb 18, 2026