# CVE-2011-1398: Other in n/a

> Remote attackers can bypass HTTP response-splitting protections in PHP via crafted URLs, potentially affecting browser interactions.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:P/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:** 30 Aug 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-g6fq-45x6-cmh4

## What is CVE-2011-1398?

CVE-2011-1398 is a medium-severity vulnerability in Php Php, published on 30 Aug 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The sapi_header_op function in main/SAPI.c in PHP before 5.3.11 and 5.4.x before 5.4.0RC2 does not check for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2011-1398?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2011-1398?

Upgrade to a fixed version.

## Is CVE-2011-1398 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-1398 exists.

Public exploit code:

- PHP 5.3.11/5.4.0RC2 - 'header()' HTTP Header Injection (exploitdb)

## Other vulnerabilities in Php Php

- [CVE-2012-2688](https://insights.sbomify.com/CVE-2012-2688/): Integer overflow in n/a (critical 10.0)
- [CVE-2012-2376](https://insights.sbomify.com/CVE-2012-2376/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3268](https://insights.sbomify.com/CVE-2011-3268/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4143](https://insights.sbomify.com/CVE-2009-4143/): Other in n/a (critical 10.0)
- [CVE-2008-5557](https://insights.sbomify.com/CVE-2008-5557/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1398 and fix it if it is affected.

What it is: CVE-2011-1398 is a medium-severity vulnerability in Php Php, published on 30 Aug 2012. 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-2011-1398 exists.

Affected product: Php Php. 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-2011-1398/ (Markdown: https://insights.sbomify.com/CVE-2011-1398/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1398
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1398
- OSV: https://osv.dev/vulnerability/CVE-2011-1398

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1398/
Summaries are generated and may contain mistakes; the official description above is the record.