PT-2018-3755 · Fedora+2 · Setup+2

Doran Moppert · Published 2018-04-24 · Updated 2019-10-09 · CVE-2018-1113

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions setup versions prior to 2.11.4-1.fc28

Description The issue is related to errors in authorization. It 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 who had their shell changed to /sbin/nologin could still access the system. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.

Recommendations For versions prior to 2.11.4-1.fc28, update to version 2.11.4-1.fc28 or later to resolve the issue. As a temporary workaround, consider restricting access to the pam shells module until a patch is available. Avoid using the /sbin/nologin and /usr/sbin/nologin shells in /etc/shells to minimize the risk of exploitation.

Fix

Incorrect Permission

Improper Authorization

Weakness Enumeration

CWE-732

CWE-285

Related Identifiers

BDU:2021-04535

CESA-2018_3249

CVE-2018-1113

RHSA-2018:3249

RHSA-2018_3249

Affected Products

Centos

Red Hat

Setup

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2018-1113 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/UAT7RDRZZKET33ZIAQG2O3PMOTXVVDM2 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1113 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2018:3249 · Vendor Advisory
• https://access.redhat.com/errata/RHBA-2019:0327 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04535 · Security Note
• https://osv.dev/vulnerability/CVE-2018-1113 · Vendor Advisory
• https://pagure.io/setup · Note
• https://pagure.io/setup/releases · Note
• https://access.redhat.com/security/cve/cve-2018-1113 · Note