# CVE-2018-1000173: Jenkins Google Login Plugin Session Fixation vulnerability

> Attackers can impersonate users by controlling the pre-authentication session in the Jenkins Google Login Plugin.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-rp82-xvg3-727c

## What is CVE-2018-1000173?

CVE-2018-1000173 is a medium-severity authentication bypass vulnerability in n/a, published on 8 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A session fixaction vulnerability exists in Jenkins Google Login Plugin 1.3 and older in GoogleOAuth2SecurityRealm.java that allows unauthorized attackers to impersonate another user if they can control the pre-authentication session.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2018-1000173?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:google-login. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jenkins-ci.plugins:google-login` | Maven | All versions | 1.3.1 |
| `org.jenkins-ci.plugins:google-login` | Maven | All versions | 1.3.1 |

Products: Jenkins Google Login.

## How do I fix CVE-2018-1000173?

Upgrade org.jenkins-ci.plugins:google-login to 1.3.1 or later.

## Is CVE-2018-1000173 being exploited?

There is no known exploitation of CVE-2018-1000173 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-41936](https://insights.sbomify.com/CVE-2023-41936/): Jenkins Google Login Plugin non-constant time token comparison (high 7.5)
- [CVE-2015-5298](https://insights.sbomify.com/CVE-2015-5298/): Jenkins Google Login Plugin 1.0 and 1.1 allows anonymous users to authenticate through client-side request modification (medium 6.5)
- [CVE-2022-46683](https://insights.sbomify.com/CVE-2022-46683/): Jenkins Google Login Plugin Open Redirect vulnerability (medium 6.1)
- [CVE-2018-1000174](https://insights.sbomify.com/CVE-2018-1000174/): Jenkins Google Login Plugin Open Redirect vulnerability (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1000173 and fix it if it is affected.

What it is: CVE-2018-1000173 is a medium-severity authentication bypass vulnerability in n/a, published on 8 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-1000173 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jenkins-ci.plugins:google-login (Maven): affected all versions; fixed in 1.3.1
- org.jenkins-ci.plugins:google-login (Maven): affected all versions; fixed in 1.3.1

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-2018-1000173/ (Markdown: https://insights.sbomify.com/CVE-2018-1000173/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1000173
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1000173
- OSV: https://osv.dev/vulnerability/CVE-2018-1000173

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1000173/
Summaries are generated and may contain mistakes; the official description above is the record.