SB2023100231 - Debian update for mosquitto
Published: October 2, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Improper Authorization (CVE-ID: CVE-2021-34434)
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to a subscriptions revoke flaw when using the dynamic security plugin. A remote attacker can send a specially crafted request and obtain subscriptions information.
2) Input validation error (CVE-ID: CVE-2021-41039)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted CONNECT packets containing lots of "user properties" and perform a denial of service (DoS) attack.
3) Resource exhaustion (CVE-ID: CVE-2023-0809)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send malicious initial packets that are not CONNECT packets, trigger memory exhaustion and perform a denial of service (DoS) attack.
4) Memory leak (CVE-ID: CVE-2023-28366)
The vulnerability allows a remote user to perform DoS attack on the target system.
The vulnerability exists due memory leak in broker. A remote client can send multiple QoS 2 messages with the same message ID, but then never respond to the PUBREC commands, which results in memory leak and denial of service condition.
5) Memory leak (CVE-ID: CVE-2023-3592)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak when processing v5 CONNECT packets. A remote attacker can force the application to leak memory by sending messages with invalid property types.
Remediation
Install update from vendor's website.