Продолжаем рассказывать об эксплуатации Ceph. Сегодня поговорим о процессе восстановления данных и флагах, которые позволяют его контролировать: norebalance, nobackfill и norecover. Статья подготовлена на основе лекции Александра Руденко, ведущего инженера в группе разработки «Облака КРОК». Лекция доступна в рамках курса по Ceph в «Слёрме». Для полного понимания рекомендуем сначала прочесть статью о флагах для управления состояниями OSD. Читать дальше →
A flaw was found in the ceph-ansible playbook where it contained hardcoded passwords that were being used as default passwords while deploying Ceph services. Any authenticated attacker can abuse this flaw to brute-force Ceph deployments, and gain administrator access to Ceph clusters via the Ceph dashboard to initiate read, write, and delete Ceph clusters and also modify Ceph cluster configurations. Versions before ceph-ansible 6.0.0alpha1 are affected.
A flaw was found in the way ceph mon handles user requests. Any authenticated ceph user having read access to ceph can delete, create ceph storage pools and corrupt snapshot images. Ceph branches master, mimic, luminous and jewel are believed to be affected.
It was found that cephx authentication protocol did not verify ceph clients correctly and was vulnerable to replay attack. Any attacker having access to ceph cluster network who is able to sniff packets on network can use this vulnerability to authenticate with ceph service and perform actions allowed by ceph service. Ceph branches master, mimic, luminous and jewel are believed to be vulnerable.