CVE-2018-6558 Information

Description

The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Reference

https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91b https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66 https://github.com/google/fscrypt/issues/77 https://launchpad.net/bugs/1787548

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5