漏洞信息
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Vulnerability Title
Ceph: AES-CBC misuse in CephX and RADOSGW enables authentication bypass and credential forgery
Vulnerability Description
Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the CephX authentication protocol encrypts tickets with AES-128-CBC in an unauthenticated mode that uses a hard-coded initialization vector and no message authentication, allowing an attacker to forge credentials and gain cluster-wide access. Because the ciphertext is malleable and the monitor will encrypt attacker-chosen entity names, an attacker holding one low-privilege key and able to observe CephX traffic can use the monitor as an encryption oracle and splice ciphertext blocks into valid tickets for privileged entities such as Manager, MDS, and OSD. The same lack of authentication also lets an attacker with CephX permissions escalate privileges by flipping a single bit in a service ticket to set its allow_all field to true. This issue is fixed in versions 20.2.4 and 19.2.6.
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Vulnerability Title
Ceph 加密问题漏洞
Vulnerability Description
Ceph是Ceph社区开源的一款分布式存储系统。 Ceph 20.2.4之前版本和19.2.6之前版本存在加密问题漏洞,该漏洞源于CephX认证协议使用AES-128-CBC未认证模式,且使用硬编码初始化向量并无消息认证,攻击者可利用监控器作为加密预言机伪造特权实体票据,从而获取集群范围访问,或通过翻转服务票据中的单个位将allow_all字段设为true以提升权限。
CVSS Information
N/A
Vulnerability Type
N/A