# CVE-2011-0419: Denial of service in n/a

> Attackers can cause denial of service via CPU and memory exhaustion using crafted wildcard sequences in the Apache Portable Runtime library.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 May 2011
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2011-0419, GHSA-hx32-x2cq-h45v, RHSA-2011:0507

## What is CVE-2011-0419?

CVE-2011-0419 is a medium-severity denial of service vulnerability in Apache Http Server, published on 16 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Stack consumption vulnerability in the fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library before 1.4.3 and the Apache HTTP Server before 2.2.18, and in fnmatch.c in libc in NetBSD 5.1, OpenBSD 4.8, FreeBSD, Apple Mac OS X 10.6, Oracle Solaris 10, and Android, allows context-dependent attackers to cause a denial of service (CPU and memory consumption) via *? sequences in the first argument, as demonstrated by attacks against mod_autoindex in httpd.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2011-0419?

It affects 10 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `apr` | Red Hat:enterprise_linux:4::as | All versions | 0:0.9.4-25.el4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:4::as | All versions | 0:0.9.4-25.el4 |
| `apr-devel` | Red Hat:enterprise_linux:4::as | All versions | 0:0.9.4-25.el4 |
| `apr` | Red Hat:enterprise_linux:4::desktop | All versions | 0:0.9.4-25.el4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:4::desktop | All versions | 0:0.9.4-25.el4 |
| `apr-devel` | Red Hat:enterprise_linux:4::desktop | All versions | 0:0.9.4-25.el4 |
| `apr` | Red Hat:enterprise_linux:4::es | All versions | 0:0.9.4-25.el4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:4::es | All versions | 0:0.9.4-25.el4 |
| `apr-devel` | Red Hat:enterprise_linux:4::es | All versions | 0:0.9.4-25.el4 |
| `apr` | Red Hat:enterprise_linux:4::ws | All versions | 0:0.9.4-25.el4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:4::ws | All versions | 0:0.9.4-25.el4 |
| `apr-devel` | Red Hat:enterprise_linux:4::ws | All versions | 0:0.9.4-25.el4 |
| `apr` | Red Hat:enterprise_linux:5::client | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:5::client | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-docs` | Red Hat:enterprise_linux:5::client | All versions | 0:1.2.7-11.el5_6.4 |
| `apr` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-devel` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:1.2.7-11.el5_6.4 |
| `apr` | Red Hat:enterprise_linux:5::server | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-debuginfo` | Red Hat:enterprise_linux:5::server | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-devel` | Red Hat:enterprise_linux:5::server | All versions | 0:1.2.7-11.el5_6.4 |
| `apr-docs` | Red Hat:enterprise_linux:5::server | All versions | 0:1.2.7-11.el5_6.4 |
| `apr` | Red Hat:enterprise_linux:6::client | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-devel` | Red Hat:enterprise_linux:6::client | All versions | 0:1.3.9-3.el6_0.1 |
| `apr` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-devel` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.3.9-3.el6_0.1 |
| `apr` | Red Hat:enterprise_linux:6::server | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-devel` | Red Hat:enterprise_linux:6::server | All versions | 0:1.3.9-3.el6_0.1 |
| `apr` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.3.9-3.el6_0.1 |
| `apr-devel` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.3.9-3.el6_0.1 |

Products: Apache Http Server, Apache Portable Runtime, Apple Mac Os X, Debian Debian Linux, Freebsd Freebsd, Google Android, Netbsd Netbsd, Openbsd Openbsd, Oracle Solaris, Suse Linux Enterprise Server.

## How do I fix CVE-2011-0419?

Upgrade to a fixed version.

## Is CVE-2011-0419 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0419 exists.

Public exploit code:

- Apache 1.4/2.2.x - APR 'apr_fnmatch()' Denial of Service (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-2011-0419 and fix it if it is affected.

What it is: CVE-2011-0419 is a medium-severity denial of service vulnerability in Apache Http Server, published on 16 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0419 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-2011-0419/ (Markdown: https://insights.sbomify.com/CVE-2011-0419/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0419
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0419
- OSV: https://osv.dev/vulnerability/CVE-2011-0419

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-0419/
Summaries are generated and may contain mistakes; the official description above is the record.