CVE-2020-6822

high

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

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/

Details

Source: MITRE

Published: 2020-04-24

Updated: 2020-05-01

Type: CWE-787

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH