The _UpgradeBeforeConfigurationChange function in lib/client/gnt_cluster.py in Ganeti 2.10.0 before 2.10.7 and 2.11.0 before 2.11.5 uses world-readable permissions for the configuration backup file, which allows local users to obtain SSL keys, remote API credentials, and other sensitive information by reading the file, related to the upgrade command.

The RESTful control interface (aka RAPI or ganeti-rapi) in Ganeti before 2.9.7, 2.10.x before 2.10.8, 2.11.x before 2.11.8, 2.12.x before 2.12.6, 2.13.x before 2.13.3, 2.14.x before 2.14.2, and 2.15.x before 2.15.2, when used in SSL mode, allows remote attackers to cause a denial of service (resource consumption) via SSL parameter renegotiation.

The RESTful control interface (aka RAPI or ganeti-rapi) in Ganeti before 2.9.7, 2.10.x before 2.10.8, 2.11.x before 2.11.8, 2.12.x before 2.12.6, 2.13.x before 2.13.3, 2.14.x before 2.14.2, and 2.15.x before 2.15.2 allows remote attackers to obtain the DRBD secret via instance information job results.