CVE-2021-1784

moderate-risk

Published 2021-09-08

A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A malicious application may be able to modify protected parts of the file system.

Do I need to act?

0.36% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Mac Os X

Affected Vendors

Apple

References (6)

Vendor Advisory https://support.apple.com/en-us/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

Vendor Advisory https://support.apple.com/en-us/HT212327

Vendor Advisory https://support.apple.com/en-us/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

Vendor Advisory https://support.apple.com/en-us/HT212327

/ 100

moderate-risk

Severity 26/34 · High

Exploitability 1/34 · Minimal

Exposure 22/34 · High