SB2019021104 - Debian update for mosquitto
Published: February 11, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2018-12546)
The vulnerability allows a remote authenticated user to gain access to potentially sensitive information.
The vulnerability exists due to an error when messages were still delivered to clients after their access to topic was revoked. A remote authenticated user was able to obtain potentially sensitive information.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2018-12550)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to insecure default permissions to topics and messages, if the ACL file is blank. A remote attacker can gain unauthorized access to sensitive information.
3) Input validation error (CVE-ID: CVE-2018-12551)
The vulnerability allows a remote attacker to bypass password authentication.
The vulnerability exists due to insufficient validation of malformed input in a password file, when it is used for authentication. Incorrect data in password file will be treated by the application as a username with empty password, allowing attacker to gain unauthorized access to the application.
Remediation
Install update from vendor's website.