Multiple vulnerabilities in Apple macOS



Published: 2020-11-06
Risk Critical
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2020-27930
CVE-2020-27932
CVE-2020-27950
CWE ID CWE-119
CWE-843
CWE-125
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerability #2 is being exploited in the wild.
Vulnerability #3 is being exploited in the wild.
Vulnerable software
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macOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Advisory

1) Memory corruption

Risk: Critical

CVSSv3: 8.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-27930

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing fonts within the FontParser component. A remote attacker can create a specially crafted document or web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15, 10.15 SU1, 10.15.1, 10.15.2, 10.15.3, 10.15.4, 10.15.4 SU1, 10.15.5, 10.15.5 SU1, 10.15.6, 10.15.6 SU1, 10.15.7

CPE External links

https://support.apple.com/en-us/HT211947

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Type Confusion

Risk: Medium

CVSSv3: 8.4 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-27932

CWE-ID: CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a type confusion error in macOS kernel. A local user can run a specially crafted application to trigger a type confusion error and execute arbitrary code with elevated privileges.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15, 10.15 SU1, 10.15.1, 10.15.2, 10.15.3, 10.15.4, 10.15.4 SU1, 10.15.5, 10.15.5 SU1, 10.15.6, 10.15.6 SU1, 10.15.7

CPE External links

https://support.apple.com/en-us/HT211947

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

3) Out-of-bounds read

Risk: Low

CVSSv3: 6.2 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-27950

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within macOS kernel. A local user can run a specially crafted program to gain access to sensitive kernel information on the system.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15, 10.15 SU1, 10.15.1, 10.15.2, 10.15.3, 10.15.4, 10.15.4 SU1, 10.15.5, 10.15.5 SU1, 10.15.6, 10.15.6 SU1, 10.15.7

CPE External links

https://support.apple.com/en-us/HT211947

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.