# CVE-2018-1048: Improper Limitation of a Pathname to a Restricted Directory in Jboss EAP Undertow

> Attackers can exploit the AJP connector to perform path traversal and read arbitrary local files on JBoss EAP servers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/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:** 24 Jan 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-1048, GHSA-prfw-3qx6-g9xr, UBUNTU-CVE-2018-1048

## What is CVE-2018-1048?

CVE-2018-1048 is a high-severity path traversal vulnerability in Redhat Jboss Enterprise Application Platform, published on 24 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

It was found that the AJP connector in undertow, as shipped in Jboss EAP 7.1.0.GA, does not use the ALLOW_ENCODED_SLASH option and thus allow the the slash / anti-slash characters encoded in the url which may lead to path traversal and result in the information disclosure of arbitrary local files.

Weakness: CWE-116 (Improper Encoding or Escaping of Output), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2018-1048?

2 open source packages ship an affected version, including org.jboss.eap:wildfly-undertow. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jboss.eap:wildfly-undertow` | Maven | From 7.1.0.GA | 7.1.1.GA |
| `org.jboss.eap:wildfly-undertow` | Maven | From 7.1.0.GA | 7.1.1.GA |

Products: Redhat Jboss Enterprise Application Platform.

## How do I fix CVE-2018-1048?

Upgrade org.jboss.eap:wildfly-undertow to 7.1.1.GA or later.

## Is CVE-2018-1048 being exploited?

There is no known exploitation of CVE-2018-1048 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Jboss Enterprise Application Platform

- [CVE-2017-12149](https://insights.sbomify.com/CVE-2017-12149/): Red Hat JBoss Application Server Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2010-1428](https://insights.sbomify.com/CVE-2010-1428/): Red Hat JBoss Information Disclosure (medium 5.9, exploited in the wild)
- [CVE-2010-0738](https://insights.sbomify.com/CVE-2010-0738/): Red Hat JBoss Authentication Bypass (low 3.7, exploited in the wild)
- [CVE-2016-3690](https://insights.sbomify.com/CVE-2016-3690/): Deserialization in n/a (critical 9.8)
- [CVE-2017-7504](https://insights.sbomify.com/CVE-2017-7504/): Deserialization in JBoss (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1048 and fix it if it is affected.

What it is: CVE-2018-1048 is a high-severity path traversal vulnerability in Redhat Jboss Enterprise Application Platform, published on 24 Jan 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-2018-1048 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jboss.eap:wildfly-undertow (Maven): affected from 7.1.0.GA; fixed in 7.1.1.GA
- org.jboss.eap:wildfly-undertow (Maven): affected from 7.1.0.GA; fixed in 7.1.1.GA

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-2018-1048/ (Markdown: https://insights.sbomify.com/CVE-2018-1048/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1048
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1048
- OSV: https://osv.dev/vulnerability/CVE-2018-1048

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1048/
Summaries are generated and may contain mistakes; the official description above is the record.