CVE-2018-1113

low-risk

Published 2018-07-03

setup before version 2.11.4-1.fc28 in Fedora and Red Hat Enterprise Linux added /sbin/nologin and /usr/sbin/nologin to /etc/shells. This violates security assumptions made by pam_shells and some daemons which allow access based on a user's shell being listed in /etc/shells. Under some circumstances, users which had their shell changed to /sbin/nologin could still access the system.

Do I need to act?

0.04% 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 4.8/10 Medium

LOCAL / LOW complexity

Affected Products (4)

Setup

Enterprise Linux Desktop

Enterprise Linux Server

Enterprise Linux Workstation

Affected Vendors

Redhat

References (6)

Vendor Advisory https://access.redhat.com/errata/RHBA-2019:0327

Vendor Advisory https://access.redhat.com/errata/RHSA-2018:3249

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1113

Vendor Advisory https://access.redhat.com/errata/RHBA-2019:0327

Vendor Advisory https://access.redhat.com/errata/RHSA-2018:3249

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1113

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low-risk

Severity 16/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 10/34 · Low