# CVE-2011-3192: Denial of service in n/a

> Remote attackers can cause denial of service via overlapping Range headers in Apache HTTP Server, requiring immediate patching.

- **Severity:** High 7.8 (`AV:N/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Aug 2011
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2011-3192, DSA-2298-1, GHSA-r3pv-69hm-fcjw, RHSA-2011:1245, RHSA-2011:1294, RHSA-2011:1300, RHSA-2011:1329, RHSA-2011:1369

## What is CVE-2011-3192?

CVE-2011-3192 is a high-severity denial of service vulnerability in Apache Http Server, published on 29 Aug 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header that expresses multiple overlapping ranges, as exploited in the wild in August 2011, a different vulnerability than CVE-2007-0086.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2011-3192?

It affects 5 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `httpd` | Red Hat:enterprise_linux:4::as | All versions | 0:2.0.52-48.ent |
| `httpd-debuginfo` | Red Hat:enterprise_linux:4::as | All versions | 0:2.0.52-48.ent |
| `httpd-devel` | Red Hat:enterprise_linux:4::as | All versions | 0:2.0.52-48.ent |
| `httpd-manual` | Red Hat:enterprise_linux:4::as | All versions | 0:2.0.52-48.ent |
| `httpd-suexec` | Red Hat:enterprise_linux:4::as | All versions | 0:2.0.52-48.ent |
| `mod_ssl` | Red Hat:enterprise_linux:4::as | All versions | 1:2.0.52-48.ent |
| `httpd` | Red Hat:enterprise_linux:4::desktop | All versions | 0:2.0.52-48.ent |
| `httpd-debuginfo` | Red Hat:enterprise_linux:4::desktop | All versions | 0:2.0.52-48.ent |
| `httpd-devel` | Red Hat:enterprise_linux:4::desktop | All versions | 0:2.0.52-48.ent |
| `httpd-manual` | Red Hat:enterprise_linux:4::desktop | All versions | 0:2.0.52-48.ent |
| `httpd-suexec` | Red Hat:enterprise_linux:4::desktop | All versions | 0:2.0.52-48.ent |
| `mod_ssl` | Red Hat:enterprise_linux:4::desktop | All versions | 1:2.0.52-48.ent |
| `httpd` | Red Hat:enterprise_linux:4::es | All versions | 0:2.0.52-48.ent |
| `httpd-debuginfo` | Red Hat:enterprise_linux:4::es | All versions | 0:2.0.52-48.ent |
| `httpd-devel` | Red Hat:enterprise_linux:4::es | All versions | 0:2.0.52-48.ent |
| `httpd-manual` | Red Hat:enterprise_linux:4::es | All versions | 0:2.0.52-48.ent |
| `httpd-suexec` | Red Hat:enterprise_linux:4::es | All versions | 0:2.0.52-48.ent |
| `mod_ssl` | Red Hat:enterprise_linux:4::es | All versions | 1:2.0.52-48.ent |
| `httpd` | Red Hat:enterprise_linux:4::ws | All versions | 0:2.0.52-48.ent |
| `httpd-debuginfo` | Red Hat:enterprise_linux:4::ws | All versions | 0:2.0.52-48.ent |
| `httpd-devel` | Red Hat:enterprise_linux:4::ws | All versions | 0:2.0.52-48.ent |
| `httpd-manual` | Red Hat:enterprise_linux:4::ws | All versions | 0:2.0.52-48.ent |
| `httpd-suexec` | Red Hat:enterprise_linux:4::ws | All versions | 0:2.0.52-48.ent |
| `mod_ssl` | Red Hat:enterprise_linux:4::ws | All versions | 1:2.0.52-48.ent |
| `httpd` | Red Hat:enterprise_linux:5::client | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-debuginfo` | Red Hat:enterprise_linux:5::client | All versions | 0:2.2.3-53.el5_7.1 |
| `mod_ssl` | Red Hat:enterprise_linux:5::client | All versions | 1:2.2.3-53.el5_7.1 |
| `httpd` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-debuginfo` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-devel` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-manual` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-45.el5_6.2 |
| `httpd` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-debuginfo` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-45.el5_6.2 |
| `httpd-debuginfo` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-devel` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-45.el5_6.2 |
| `httpd-devel` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-53.el5_7.1 |
| `httpd-manual` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-45.el5_6.2 |
| `httpd-manual` | Red Hat:enterprise_linux:5::server | All versions | 0:2.2.3-53.el5_7.1 |
| `mod_ssl` | Red Hat:enterprise_linux:5::server | All versions | 1:2.2.3-45.el5_6.2 |

Products: Apache Http Server, Canonical Ubuntu Linux, Opensuse Opensuse, Suse Linux Enterprise Server, Suse Linux Enterprise Software Development Kit.

## How do I fix CVE-2011-3192?

Upgrade to a fixed version.

## Is CVE-2011-3192 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-3192 exists.

Public exploit code:

- Python Apache Killer (Range Header DoS CVE-2011-3192) (github_poc): https://github.com/tkisason/KillApachePy
- CVE-2011-3192 - Remote Apache DOS for Apache versions 1.3.x, 2.0.64 and below and 2.2.19 and below. Developed in 2011 by Antonius (ev1lut10n / w1sdom) (github_poc): https://github.com/bluedragonsecurity/CVE-2011-3192-apache-exploit
- Apache - Remote Memory Exhaustion (Denial of Service) (exploitdb)
- Apache Range Header DoS (Apache Killer) (metasploit)
- Apache - Denial of Service (exploitdb)
- This Repository use to test Apache Killer (cve-2011-3192). (github_poc): https://github.com/stcmjp/cve-2011-3192

## 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-2011-3192 and fix it if it is affected.

What it is: CVE-2011-3192 is a high-severity denial of service vulnerability in Apache Http Server, published on 29 Aug 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-2011-3192 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-2011-3192/ (Markdown: https://insights.sbomify.com/CVE-2011-3192/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-3192
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-3192
- OSV: https://osv.dev/vulnerability/CVE-2011-3192

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-3192/
Summaries are generated and may contain mistakes; the official description above is the record.