# CVE-2018-1129: Auth bypass in ceph

> An attacker on the cluster network can bypass Cephx signature checks by altering message payloads, compromising authentication integrity.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **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:** 10 Jul 2018
- **Updated:** 17 Sep 2024
- **Also known as:** AZL-38221, DEBIAN-CVE-2018-1129, GHSA-7qc9-w55v-w7p3

## What is CVE-2018-1129?

CVE-2018-1129 is a medium-severity authentication bypass vulnerability in Debian Debian Linux, published on 10 Jul 2018. 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 way signature calculation was handled by cephx authentication protocol. An attacker having access to ceph cluster network who is able to alter the message payload was able to bypass signature checks done by cephx protocol. Ceph branches master, mimic, luminous and jewel are believed to be vulnerable.

Weakness: CWE-287 (Improper Authentication), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2018-1129?

It affects 10 products.


Products: Ceph Ceph, Debian Debian Linux, Opensuse Leap, Redhat Ceph Storage, Redhat Ceph Storage Mon, Redhat Ceph Storage Osd, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2018-1129?

Apply the vendor's patch.

## Is CVE-2018-1129 being exploited?

There is no known exploitation of CVE-2018-1129 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2018-10861](https://insights.sbomify.com/CVE-2018-10861/): Missing authorization in ceph (high 8.1)
- [CVE-2019-10222](https://insights.sbomify.com/CVE-2019-10222/): Denial of service in ceph (high 7.5)
- [CVE-2017-12155](https://insights.sbomify.com/CVE-2017-12155/): Openstack tripleo-heat-templates unauthenticated file access (medium 6.3)
- [CVE-2017-7519](https://insights.sbomify.com/CVE-2017-7519/): Denial of service in ceph (low 2.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1129 and fix it if it is affected.

What it is: CVE-2018-1129 is a medium-severity authentication bypass vulnerability in Debian Debian Linux, published on 10 Jul 2018. 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-2018-1129 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2018-1129/ (Markdown: https://insights.sbomify.com/CVE-2018-1129/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1129
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1129
- OSV: https://osv.dev/vulnerability/CVE-2018-1129

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1129/
Summaries are generated and may contain mistakes; the official description above is the record.