Red Hat Ceph RGW Code Base Denial of Service Vulnerability [CVE-2018-16846]

CVE Number – CVE-2018-16846

A vulnerability in Red Hat Ceph could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.The vulnerability exists in the RADOS Gateway (RGW) code base of the affected software and is due to improper bounds checking on the ListBucket max-keys function during bucket listing operations. An attacker with Ceph RGW user permissions could exploit this vulnerability to cause a DoS condition on object maps (OMAPs) holding bucket indexes on a targeted system.Red Hat Ceph has confirmed the vulnerability and released software updates.


  • 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.


  • 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

  • Red Hat Ceph has released a changelog at the following link: CVE-2018-16846

Fixed Software

  • Red Hat Ceph has released software updates at the following link: Ceph 13.2.4

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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