# CVE-2009-0652: Other in n/a

> Remote attackers can spoof URLs using box-drawing characters in IDN domains to conduct phishing attacks against Firefox users.

- **Severity:** Medium 5.8 (`AV:N/AC:M/Au:N/C:N/I:P/A:P`)
- **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:** 20 Feb 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-h8qx-x78q-837g

## What is CVE-2009-0652?

CVE-2009-0652 is a medium-severity vulnerability in Mozilla Firefox, published on 20 Feb 2009. 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

The Internationalized Domain Names (IDN) blacklist in Mozilla Firefox 3.0.6 and other versions before 3.0.9; Thunderbird before 2.0.0.21; and SeaMonkey before 1.1.15 does not include box-drawing characters, which allows remote attackers to spoof URLs and conduct phishing attacks, as demonstrated by homoglyphs of the / (slash) and ? (question mark) characters in a subdomain of a .cn domain name, a different vulnerability than CVE-2005-0233.  NOTE: some third parties claim that 3.0.6 is not affected, but much older versions perhaps are affected.

## Which versions are affected by CVE-2009-0652?

It affects 3 products.


Products: Mozilla Firefox, Mozilla Seamonkey, Mozilla Thunderbird.

## How do I fix CVE-2009-0652?

Upgrade to a fixed version.

## Is CVE-2009-0652 being exploited?

There is no known exploitation of CVE-2009-0652 in the wild and no public exploit code.

## 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-2009-0652 and fix it if it is affected.

What it is: CVE-2009-0652 is a medium-severity vulnerability in Mozilla Firefox, published on 20 Feb 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2009-0652 in the wild and no public exploit code.

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-2009-0652/ (Markdown: https://insights.sbomify.com/CVE-2009-0652/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0652
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0652
- OSV: https://osv.dev/vulnerability/CVE-2009-0652

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From sbomify Insights: https://insights.sbomify.com/CVE-2009-0652/
Summaries are generated and may contain mistakes; the official description above is the record.