CVE-2020-25660 Information

Description

A flaw was found in the Cephx authentication protocol in versions before 15.2.6 and before 14.2.14 where it does not verify Ceph clients correctly and is then vulnerable to replay attacks in Nautilus. This flaw allows an attacker with access to the Ceph cluster network to authenticate with the Ceph service via a packet sniffer and perform actions allowed by the Ceph service. This issue is a reintroduction of CVE-2018-1128 affecting the msgr2 protocol. The msgr 2 protocol is used for all communication except older clients that do not support the msgr2 protocol. The msgr1 protocol is not affected. The highest threat from this vulnerability is to confidentiality integrity and system availability.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1890354 https://ceph.io/community/v15-2-6-octopus-released/ https://ceph.io/releases/v14-2-14-nautilus-released/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBC4KZ44QUQENTYZPVHORGL4K2KV5V4F/ https://security.gentoo.org/glsa/202105-39

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8