A type confusion issue was addressed with improved memory handling. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.
http://seclists.org/fulldisclosure/2020/Nov/18
http://www.openwall.com/lists/oss-security/2020/11/23/3
https://security.gentoo.org/glsa/202012-10
Source: MITRE
Published: 2020-10-16
Updated: 2020-12-23
Type: CWE-843
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
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