CVE-2020-9901 - Improper Link Resolution Before File Access ('Link Following')

Severity

78%

Complexity

18%

Confidentiality

98%

An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8. A local attacker may be able to elevate their privileges.

CVSS 3.1 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 4.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P).

Overview

First reported 4 years ago

2020-10-22 19:15:00

Last updated 4 years ago

2020-10-29 20:24:00

Affected Software

Apple Mac OS X

References

https://support.apple.com/kb/HT211288

https://support.apple.com/kb/HT211289

https://support.apple.com/kb/HT211290

https://support.apple.com/kb/HT211288

Vendor Advisory

https://support.apple.com/kb/HT211289

Vendor Advisory

https://support.apple.com/kb/HT211290

Vendor Advisory

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