CVE-2020-6806 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html https://bugzilla.mozilla.org/show_bug.cgi?id=1612308 https://usn.ubuntu.com/4328-1/ https://usn.ubuntu.com/4335-1/ https://www.mozilla.org/security/advisories/mfsa2020-08/ https://www.mozilla.org/security/advisories/mfsa2020-09/ https://www.mozilla.org/security/advisories/mfsa2020-10/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8