# CVE-2020-25660: Auth bypass in ceph > An attacker on the cluster network can bypass Cephx authentication via replay attacks to perform unauthorized actions on the Ceph service. - **Severity:** High 8.8 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 23 Nov 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-25660, GHSA-457q-vj84-7r8r, RHSA-2020:5325, SUSE-SU-2020:3459-1, SUSE-SU-2020:3473-1, SUSE-SU-2020:3473-2, SUSE-SU-2020:3539-1, UBUNTU-CVE-2020-25660, openSUSE-SU-2020:2057-1, openSUSE-SU-2020:2082-1 ## What is CVE-2020-25660? CVE-2020-25660 is a high-severity authentication bypass vulnerability in Fedoraproject Fedora, published on 23 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim. ### Official 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. Weakness: CWE-294 (Authentication Bypass by Capture-replay) ## Which versions are affected by CVE-2020-25660? It affects 4 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `ceph` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-base` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-common` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-debuginfo` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-fuse` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-grafana-dashboards` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mds` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mgr` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mgr-dashboard` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mgr-diskprediction-local` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mgr-k8sevents` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mgr-rook` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-mon` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-osd` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-radosgw` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-selinux` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph-test` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `libcephfs-devel` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `libcephfs2` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librados-devel` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librados2` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `libradospp-devel` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `libradosstriper1` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librbd-devel` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librbd1` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librgw-devel` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `librgw2` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `python-ceph-argparse` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `python-cephfs` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `python-rados` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `python-rbd` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `python-rgw` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `rbd-mirror` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `rbd-nbd` | Red Hat:ceph_storage:4::el7 | All versions | 2:14.2.8-115.el7cp | | `ceph` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | | `ceph-base` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | | `ceph-base-debuginfo` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | | `ceph-common` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | | `ceph-common-debuginfo` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | | `ceph-debugsource` | Red Hat:ceph_storage:4::el8 | All versions | 2:14.2.8-115.el8cp | Products: Fedoraproject Fedora, Redhat Ceph, Redhat Ceph Storage, Redhat Openshift Container Platform. ## How do I fix CVE-2020-25660? Upgrade to a fixed version. ## Is CVE-2020-25660 being exploited? There is no known exploitation of CVE-2020-25660 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-25660 and fix it if it is affected. What it is: CVE-2020-25660 is a high-severity authentication bypass vulnerability in Fedoraproject Fedora, published on 23 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-25660 in the wild and no public exploit code. Affected product: Fedoraproject Fedora. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-25660/ (Markdown: https://insights.sbomify.com/CVE-2020-25660/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-25660 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-25660 - OSV: https://osv.dev/vulnerability/CVE-2020-25660 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-25660/ Summaries are generated and may contain mistakes; the official description above is the record.