CVE-2018-16883

Description

sssd, versions 1.13.0 to before 2.0.0, did not properly restrict access to the infopipe according to the "allowed_uids" configuration parameter. Sensitive information could be inadvertently disclosed to local attackers if it was stored in the user directory.

Statement

The information exposed by this vulnerability is typically not highly sensitive. By default, it is only those fields returned by getpwent() and getgrent().

Mitigation

This vulnerability is only exposed if the infopipe service is enabled (enabled by default in Red Hat Enterprise Linux 7, disabled by default in Red Hat Enterprise Linux 6), and `[ifp].allowed_uids` is relied upon to protect sensitive information in the user directory.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score2.55.5N/A
Attack VectorLocalLocalN/A
Attack ComplexityHighLowN/A
Privileges RequiredLowLowN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityLowHighN/A
Integrity ImpactNoneNoneN/A
Availability ImpactNoneNoneN/A

Vector

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

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

Understanding the Weakness (CWE)

CWE-200

Confidentiality

Technical Impact: Read Application Data

Acknowledgements

This issue was discovered by Christian Heimes (Red Hat).

Frequently Asked Questions

Not sure what something means? Check out our Security Glossary.

Want to get errata notifications? Sign up here.