CVE-2025-30156
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2025-30156 NameCVE-2025-30156 SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) Vulnerable and fixed packages The table below lists information on source packages. Source PackageReleaseVersionStatus ceph (PTS)bullseye14.2.21-1vulnerable bullseye (security)14.2.21-1+deb11u3vulnerable…
CVE-2025-30156
| Name | CVE-2025-30156 |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ceph (PTS) | bullseye | 14.2.21-1 | vulnerable |
| bullseye (security) | 14.2.21-1+deb11u3 | vulnerable | |
| bookworm, bookworm (security) | 16.2.15+ds-0+deb12u2 | vulnerable | |
| trixie (security), trixie | 18.2.7+ds-1+deb13u1 | vulnerable | |
| forky, sid | 20.2.2+ds-13 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ceph | source | (unstable) | (unfixed) |
Notes
https://github.com/ceph/ceph/security/advisories/GHSA-7q3q-3975-qw3q
https://docs.ceph.com/en/latest/security/CVE-2025-30156/
Apply commands
https://github.com/ceph/ceph/security/advisories/GHSA-7q3q-3975-qw3qhttps://docs.ceph.com/en/latest/security/CVE-2025-30156/OS impact
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 20.2.4+ds-1 |
| forky | Affected | — |
| bullseye | Affected | — |
| bookworm | Affected | — |
References
CWEs
CWE-327
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.