Kubernetes SMB Volume Mount Command-Line Argument Injection Vulnerability [CVE-2018-1002101]

CVE Number – CVE-2018-1002101

A vulnerability in Kubernetes could allow an authenticated, remote attacker to conduct a command-line argument injection attack on a targeted system.The vulnerability exists because the affected software improperly handles user-supplied input when Server Message Block (SMB) volumes are mounted on Windows nodes. An attacker could exploit this vulnerability by sending malicious input to a targeted system while setting up an SMB volume mount. A successful exploit could allow the attacker to conduct a command-line argument injection attack, which the attacker could use to execute arbitrary code or access or modify sensitive information.Kubernetes has confirmed the vulnerability and released a software patch.

Analysis

  • To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.

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

  • Kubernetes has released a bug report at the following link: Bug #65750

Duncan Newell

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

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