Vulnerability identifier: #VU28310

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-9841

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the SkyLight module. A local user can pass specially crafted data to the application, trigger integer overflow, escalate privileges and execute arbitrary code in the context of WindowServer.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15.4 19E266

---

External links
http://www.zerodayinitiative.com/advisories/ZDI-20-683/
http://support.apple.com/en-gb/HT211170

---

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?

No. We are not aware of malware exploiting this vulnerability.