Critical severity · published Oct 27, 2020
CVE-2020-9866
A buffer overflow was addressed with improved bounds checking
9.8
CVSS
1.9%
EPSS
No
On KEV
Description
A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. A buffer overflow may result in arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Mac OS X · Apple
before 10.15.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9866
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9866
Release Notes
https://support.apple.com/en-us/HT211289
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