# CVE-2018-1128: Auth bypass in ceph

> Attackers on the network can replay authentication packets to bypass Ceph client verification and access the storage cluster.

- **Severity:** High 7.5 (`CVSS:3.0/AV:A/AC:H/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:** 10 Jul 2018
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2018-1128, GHSA-xw3f-9qfw-v43f, UBUNTU-CVE-2018-1128

## What is CVE-2018-1128?

CVE-2018-1128 is a high-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

It was found that cephx authentication protocol did not verify ceph clients correctly and was vulnerable to replay attack. Any attacker having access to ceph cluster network who is able to sniff packets on network can use this vulnerability to authenticate with ceph service and perform actions allowed by ceph service. Ceph branches master, mimic, luminous and jewel are believed to be vulnerable.

Weakness: CWE-287 (Improper Authentication), CWE-294 (Authentication Bypass by Capture-replay)

## Which versions are affected by CVE-2018-1128?

It affects 10 products.


Products: Debian Debian Linux, Opensuse Leap, Redhat Ceph, 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-2018-1128?

Apply the vendor's patch.

## Is CVE-2018-1128 being exploited?

There is no known exploitation of CVE-2018-1128 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1128 and fix it if it is affected.

What it is: CVE-2018-1128 is a high-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-2018-1128 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-2018-1128/ (Markdown: https://insights.sbomify.com/CVE-2018-1128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1128
- OSV: https://osv.dev/vulnerability/CVE-2018-1128

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1128/
Summaries are generated and may contain mistakes; the official description above is the record.