SB2019040939 - Fedora 30 update for samba

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Main Vulnerability Database SB2019040939

SB2019040939 - Fedora 30 update for samba

Published: April 9, 2019 Updated: April 24, 2025

Security Bulletin ID SB2019040939
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Incorrect default permissions (CVE-ID: CVE-2019-3870)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for files and folders (e.g. 0666) within installation location that are set by the application during the creation of a new Samba AD DC. A local user with access to the system can view contents of files and directories or modify them.

Note, such application behavior can occur on some upgraded Samba versions.


2) Symlink attack (CVE-ID: CVE-2019-3880)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to a symlink following issue within the RPC endpoint emulating the Windows registry service API. A remote unprivileged attacker with ability to create a symlink can create a new registry hive file anywhere they have unix permissions to create a new file within a Samba share.

Successful exploitation of this vulnerability may allow an attacker to detect presence of exiting files on the system or perform phishing attacks and trick other users to upload files into insecure locations.

Remediation

Install update from vendor's website.

References