# CVE-2018-0489: Security feature bypass in Shibboleth XMLTooling-C before 1.6.4

> Remote attackers can bypass digital signature verification to obtain sensitive information or impersonate users via crafted XML data.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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:** 27 Feb 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-0489, DLA-1296-1, DSA-4126-1, GHSA-4479-q654-wmq5, UBUNTU-CVE-2018-0489

## What is CVE-2018-0489?

CVE-2018-0489 is a medium-severity vulnerability in Debian Debian Linux, published on 27 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Shibboleth XMLTooling-C before 1.6.4, as used in Shibboleth Service Provider before 2.6.1.4 on Windows and other products, mishandles digital signatures of user data, which allows remote attackers to obtain sensitive information or conduct impersonation attacks via crafted XML data. NOTE: this issue exists because of an incomplete fix for CVE-2018-0486.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2018-0489?

It affects 3 products.


Products: Arubanetworks Clearpass, Debian Debian Linux, Shibboleth Xmltooling-C.

## How do I fix CVE-2018-0489?

Upgrade to a fixed version.

## Is CVE-2018-0489 being exploited?

There is no known exploitation of CVE-2018-0489 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2014-5342](https://insights.sbomify.com/CVE-2014-5342/): Command injection in n/a (critical 10.0)
- [CVE-2014-6626](https://insights.sbomify.com/CVE-2014-6626/): Auth bypass in n/a (critical 10.0)
- [CVE-2021-29145](https://insights.sbomify.com/CVE-2021-29145/): Server-side request forgery in Aruba ClearPass Policy Manager (critical 9.8)
- [CVE-2020-7114](https://insights.sbomify.com/CVE-2020-7114/): Missing authorization in ClearPass Policy Manager (critical 9.8)
- [CVE-2016-4401](https://insights.sbomify.com/CVE-2016-4401/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0489 and fix it if it is affected.

What it is: CVE-2018-0489 is a medium-severity vulnerability in Debian Debian Linux, published on 27 Feb 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-2018-0489 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-2018-0489/ (Markdown: https://insights.sbomify.com/CVE-2018-0489/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0489
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0489
- OSV: https://osv.dev/vulnerability/CVE-2018-0489

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-0489/
Summaries are generated and may contain mistakes; the official description above is the record.