CVE-2020-6822 Information

Description

On 32-bit builds an out of bounds write could have occurred when processing an image larger than 4 GB in codeGMPDecodeData/code. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird 68.7.0 Firefox ESR 68.7 and Firefox 75.

CVSS Vector

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

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1544181 https://usn.ubuntu.com/4335-1/ https://www.mozilla.org/security/advisories/mfsa2020-12/ https://www.mozilla.org/security/advisories/mfsa2020-13/ https://www.mozilla.org/security/advisories/mfsa2020-14/

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