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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ceph | All ceph versions before 15.2.6 and before 14.2.14 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ceph | 14.2.15-1 | — |
| Debian 13 | ceph | 14.2.15-1 | — |
| Debian 12 | ceph | 14.2.15-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | ceph | 15.2.7-0ubuntu0.20.04.2 | USN-4706-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Ceph Storage 4 | ceph +32 | 2:14.2.8-115.el7cp | RHSA-2021:0081, RHSA-2020:5325 |
| Red Hat Ceph Storage 4 | ceph-ansible | 4.0.41-1.el7cp | RHSA-2021:0081 |
| Red Hat Ceph Storage 4 | python3-rbd +4 | 2:14.2.8-115.el8cp | RHSA-2021:0081, RHSA-2020:5325 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | ceph | 15.2.5.667+g1a579d5bf2-3.5.1 | SUSE-SU-2020:3473-1 |
| SLES 15 SP1 | ceph | 14.2.13.450+g65ea1b614d-3.52.1 | SUSE-SU-2020:3459-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Enterprise Storage 7 | ceph | 15.2.5.667+g1a579d5bf2-3.3.1 | SUSE-SU-2020:3539-1, SUSE-SU-2020:3473-2 |
| SUSE Enterprise Storage 6 | ceph | 14.2.13.450+g65ea1b614d-3.52.1 | SUSE-SU-2020:3459-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ceph | 16.2.6.463+g22e7612f9ad-1.1 | openSUSE-SU-2024:11652-1 |
| openSUSE Leap 15.2 | ceph +1 | 15.2.5.667+g1a579d5bf2-lp152.2.3.1 | openSUSE-SU-2020:2082-1 |
| openSUSE Leap 15.1 | ceph +1 | 14.2.13.450+g65ea1b614d-lp151.2.28.1 | openSUSE-SU-2020:2057-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | ceph16 | 15.2.6-r0 | — |
| Alpine v3.17 | ceph16 | 15.2.6-r0 | — |
| Alpine v3.16 | ceph | 15.2.6-r0 | — |
| Alpine v3.15 | ceph | 15.2.6-r0 | — |
| Alpine v3.14 | ceph | 15.2.6-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.13 | ceph | 15.2.6-r0 | — |
| Alpine v3.12 | ceph | 14.2.19-r0 | — |
| Alpine v3.11 | ceph | 14.2.19-r0 | — |
Advisories 10
- RHSA-2021:0081 Red Hat Security Advisory: Red Hat Ceph Storage 4.2 Security and Bug Fix update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2020:5325 Red Hat Security Advisory: Red Hat Ceph Storage 4.1 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4706-1 ceph vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2020:2082-1 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3473-1 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3473-2 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11652-1 ceph-16.2.6.463+g22e7612f9ad-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3459-1 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2057-1 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3539-1 Security update for ceph SUSE / openSUSE Security Updates · Feb 4, 2026