Eclipse Mosquitto CONNECT Packet Processing Denial of Service Vulnerability [CVE-2017-7651]

CVE Number –  CVE-2017-7651

A vulnerability in Eclipse Mosquitto could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to insufficient validation of user-supplied input that is processed by the affected software. An attacker could exploit this vulnerability by sending a crafted CONNECT packet to a targeted system. A successful exploit could cause a resource exhaustion condition, resulting in a DoS condition on the targeted system.

Eclipse has confirmed the vulnerability and released software updates.

Analysis
  • To exploit this vulnerability, the attacker must send a CONNECT packet that submits malicious input to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Safeguards
  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.

    Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

    Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

    Administrators are advised to monitor affected systems.

Vendor Announcements
  • Eclipse has released a bug report and a security advisory at the following links: Bug 529754 and CVE-2017-7651

Fixed Software
  • Eclipse has released software updates at the following link: Eclipse Mosquitto 1.4.15



Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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