# CVE-2011-3375: Apache Tomcat Exposes IP Addresses and HTTP Headers of Requests

> Remote attackers can read sensitive IP and HTTP header data from Tomcat request objects due to improper caching and recycling operations.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/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:** 19 Jan 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-rp8h-vr48-4j8p

## What is CVE-2011-3375?

CVE-2011-3375 is a medium-severity vulnerability in Apache Tomcat, published on 19 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Apache Tomcat 6.0.30 through 6.0.33 and 7.x before 7.0.22 does not properly perform certain caching and recycling operations involving request objects, which allows remote attackers to obtain unintended read access to IP address and HTTP header information in opportunistic circumstances by reading TCP data.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2011-3375?

4 open source packages ship an affected version, including org.apache.tomcat:tomcat. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.apache.tomcat:tomcat` | Maven | From 6.0.30 | 6.0.35 |
| `org.apache.tomcat:tomcat` | Maven | From 6.0.30 | 6.0.35 |
| `org.apache.tomcat:tomcat` | Maven | From 7.0 | 7.0.22 |
| `org.apache.tomcat:tomcat` | Maven | From 7.0 | 7.0.22 |

Products: Apache Tomcat.

## How do I fix CVE-2011-3375?

Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 6.0.35 or 7.0.22.

## Is CVE-2011-3375 being exploited?

There is no known exploitation of CVE-2011-3375 in the wild and no public exploit code.

## Other vulnerabilities in Apache Tomcat

- [CVE-2025-24813](https://insights.sbomify.com/CVE-2025-24813/): Apache Tomcat Path Equivalence (critical 10.0, exploited in the wild)
- [CVE-2016-8735](https://insights.sbomify.com/CVE-2016-8735/): Apache Tomcat Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2017-12617](https://insights.sbomify.com/CVE-2017-12617/): Apache Tomcat Remote Code Execution (high 8.1, exploited in the wild)
- [CVE-2017-12615](https://insights.sbomify.com/CVE-2017-12615/): Apache Tomcat on Windows Remote Code Execution (high 8.1, exploited in the wild)
- [CVE-2026-34486](https://insights.sbomify.com/CVE-2026-34486/): Apache Tomcat Missing Encryption of Sensitive Data (high 7.5, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-3375 and fix it if it is affected.

What it is: CVE-2011-3375 is a medium-severity vulnerability in Apache Tomcat, published on 19 Jan 2012. 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-2011-3375 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.apache.tomcat:tomcat (Maven): affected from 6.0.30; fixed in 6.0.35
- org.apache.tomcat:tomcat (Maven): affected from 6.0.30; fixed in 6.0.35
- org.apache.tomcat:tomcat (Maven): affected from 7.0; fixed in 7.0.22
- org.apache.tomcat:tomcat (Maven): affected from 7.0; fixed in 7.0.22

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-2011-3375/ (Markdown: https://insights.sbomify.com/CVE-2011-3375/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-3375
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-3375
- OSV: https://osv.dev/vulnerability/CVE-2011-3375

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-3375/
Summaries are generated and may contain mistakes; the official description above is the record.