# CVE-2011-0065: Use after free in n/a

> Remote attackers can execute arbitrary code via a use-after-free flaw in Mozilla Firefox and SeaMonkey, requiring user interaction to visit a malicious page.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 7 May 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-j27m-p5vq-3f4g

## What is CVE-2011-0065?

CVE-2011-0065 is a critical use after free vulnerability in Mozilla Firefox, published on 7 May 2011. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Use-after-free vulnerability in Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, allows remote attackers to execute arbitrary code via vectors related to OBJECT's mChannel.

Weakness: CWE-399

## Which versions are affected by CVE-2011-0065?

It affects 2 products.


Products: Mozilla Firefox, Mozilla Seamonkey.

## How do I fix CVE-2011-0065?

Upgrade to a fixed version.

## Is CVE-2011-0065 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0065 exists.

Public exploit code:

- Mozilla Firefox 3.6.16 mChannel Use-After-Free (metasploit)
- Mozilla Firefox 3.6.16 mChannel Use-After-Free Vulnerability (metasploit)
- Mozilla Firefox 3.6.16 - OBJECT mChannel Remote Code Execution (DEP Bypass) (Metasploit) (exploitdb)
- Mozilla Firefox 3.6.16 (Windows) - mChannel Use-After-Free (Metasploit) (1) (exploitdb)
- Mozilla Firefox 3.6.16 (Windows 7) - mChannel Object Use-After-Free (exploitdb)
- Mozilla Firefox 3.6.16 (OSX) - mChannel Use-After-Free (Metasploit) (2) (exploitdb)

## Other vulnerabilities in Mozilla Firefox

- [CVE-2019-11708](https://insights.sbomify.com/CVE-2019-11708/): Mozilla Firefox and Thunderbird Sandbox Escape (critical 10.0, exploited in the wild)
- [CVE-2010-3765](https://insights.sbomify.com/CVE-2010-3765/): Mozilla Multiple Products Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-26486](https://insights.sbomify.com/CVE-2022-26486/): Mozilla Firefox Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2022-26485](https://insights.sbomify.com/CVE-2022-26485/): Mozilla Firefox Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2019-11707](https://insights.sbomify.com/CVE-2019-11707/): Mozilla Firefox and Thunderbird Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-0065 and fix it if it is affected.

What it is: CVE-2011-0065 is a critical use after free vulnerability in Mozilla Firefox, published on 7 May 2011. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0065 exists.

Affected product: Mozilla Firefox. 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-2011-0065/ (Markdown: https://insights.sbomify.com/CVE-2011-0065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0065
- OSV: https://osv.dev/vulnerability/CVE-2011-0065

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From sbomify Insights: https://insights.sbomify.com/CVE-2011-0065/
Summaries are generated and may contain mistakes; the official description above is the record.