SB20260824292 - MitM attack in Red hat Ceph

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Main Vulnerability Database SB20260824292

SB20260824292 - MitM attack in Red hat Ceph

Published: August 24, 2026

Security Bulletin ID SB20260824292
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Privilege escalation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2025-30156)

CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

CVSSv4: 8.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to bypass authentication and gain cluster-wide access.

The vulnerability exists due to use of a broken or risky cryptographic algorithm in the CephX authentication implementation when processing CephX tickets over the network. A remote user can manipulate observed ciphertext and forge credentials to bypass authentication and gain cluster-wide access.

Exploitation requires a low-privilege CephX key and the ability to observe CephX ciphertext on the local network.


Remediation

Install update from vendor's website.

References