Authentication bypass in Ceph



Published: 2020-11-27
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-25660
CWE-ID CWE-288
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe 		Ceph
Server applications / Other server solutions

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Authentication bypass using an alternate path or channel

EUVDB-ID: #VU48684

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-25660

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists with in the implementation of the Cephx authentication protocol. A remote attacker with access to the Ceph cluster network can intercept authentication packets and perform  replay attacks in Nautilus.

The vulnerability affects msgr2 protocol only and is basically a reintroduction of previously patched vulnerability #VU14542.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ceph: 14.0.0 - 15.2.5

CPE2.3 External links

http://bugzilla.redhat.com/show_bug.cgi?id=1890354
http://ceph.io/community/v15-2-6-octopus-released/
http://ceph.io/releases/v14-2-14-nautilus-released/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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