# CVE-2001-0042: PHP 3.x (PHP3) on Apache 1.3.6 allows remote attackers to read arbitrary files via a modified ..


- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 1 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-gm7x-33x3-3qg9

## What is CVE-2001-0042?

CVE-2001-0042 is a medium-severity vulnerability in Apache Http Server, published on 1 Sep 2004. 

### Official description

PHP 3.x (PHP3) on Apache 1.3.6 allows remote attackers to read arbitrary files via a modified .. (dot dot) attack containing "%5c" (encoded backslash) sequences.

## Which versions are affected by CVE-2001-0042?

It affects 1 product.


Products: Apache Http Server.

## How do I fix CVE-2001-0042?

No fix has been published for CVE-2001-0042 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-0042 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2001-0042 exists.

Public exploit code:

- Apache 1.3 + PHP 3 - File Disclosure (exploitdb)

## Other vulnerabilities in Apache Http Server

- [CVE-2021-42013](https://insights.sbomify.com/CVE-2021-42013/): Apache HTTP Server Path Traversal (critical 9.8, exploited in the wild)
- [CVE-2024-38475](https://insights.sbomify.com/CVE-2024-38475/): Apache HTTP Server Improper Escaping of Output (critical 9.1, exploited in the wild)
- [CVE-2021-40438](https://insights.sbomify.com/CVE-2021-40438/): Apache HTTP Server-Side Request Forgery (SSRF) (critical 9.0, exploited in the wild)
- [CVE-2019-0211](https://insights.sbomify.com/CVE-2019-0211/): Apache HTTP Server Privilege Escalation (high 7.8, exploited in the wild)
- [CVE-2021-41773](https://insights.sbomify.com/CVE-2021-41773/): Apache HTTP Server Path Traversal (high 7.5, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-0042 and fix it if it is affected.

What it is: CVE-2001-0042 is a medium-severity vulnerability in Apache Http Server, published on 1 Sep 2004. 
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2001-0042 exists.

Affected product: Apache Http Server. 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-2001-0042/ (Markdown: https://insights.sbomify.com/CVE-2001-0042/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-0042
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-0042
- OSV: https://osv.dev/vulnerability/CVE-2001-0042

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-0042/
Summaries are generated and may contain mistakes; the official description above is the record.