CVE-2020-6822

HIGH

Firefox < 75.0, Firefox ESR < 68.7.0, Thunderbird < 68.7.0 - Out-of-bounds Write in GMPDecodeData

Title source: llm
STIX 2.1

Description

On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</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.

References (5)

Core 5
Core References
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1544181
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/

Scores

CVSS v3 8.8
EPSS 0.0082
EPSS Percentile 74.5%
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-787
Status published
Products (3)
mozilla/firefox < 75.0
mozilla/firefox_esr < 68.7.0
mozilla/thunderbird < 68.7.0
Published Apr 24, 2020
Tracked Since Feb 18, 2026