Hazelcast Cluster Join Procedure Remote Code Execution Vulnerability [CVE-2016-10750]

CVE number – CVE-2016-10750

A vulnerability in Hazelcast could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability exists because the cluster join procedure feature of the affected software allows for the deserialization of untrusted input. An attacker could exploit this vulnerability by sending a JoinRequest that submits malicious input to a targeted, listening Hazelcast instance. If vulnerable classes exist in the classpath on the system, a successful exploit could allow the attacker to execute arbitrary code. 

Hazelcast has confirmed the vulnerability and released a software update.


  • To exploit this vulnerability, an attacker may need to be on the same, trusted network where the targeted system resides to send a request that submits malicious input to the system. This access requirement may reduce the likelihood of a successful exploit.


  • 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

  • Hazelcast has released an issue report at the following link: Issue #8024

Fixed Software

Jason Davies

UK based technology professional, with an interest in computer security and telecoms.

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