# CVE-2009-3881: Information disclosure in n/a

> Remote attackers can gain privileges via an information leak in the Java ClassLoader mechanism, affecting Java SE and OpenJDK users.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Nov 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-f9mh-6367-45hp

## What is CVE-2009-3881?

CVE-2009-3881 is a high-severity vulnerability in Sun Jre, published on 9 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Sun Java SE 5.0 before Update 22 and 6 before Update 17, and OpenJDK, does not prevent the existence of children of a resurrected ClassLoader, which allows remote attackers to gain privileges via unspecified vectors, related to an "information leak vulnerability," aka Bug Id 6636650.

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

## Which versions are affected by CVE-2009-3881?

It affects 2 products.


Products: Sun Jre, Sun Openjdk.

## How do I fix CVE-2009-3881?

Upgrade to a fixed version.

## Is CVE-2009-3881 being exploited?

There is no known exploitation of CVE-2009-3881 in the wild and no public exploit code.

## Other vulnerabilities in Sun Jre

- [CVE-2004-2764](https://insights.sbomify.com/CVE-2004-2764/): Information disclosure in n/a (critical 10.0)
- [CVE-2009-1671](https://insights.sbomify.com/CVE-2009-1671/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-1672](https://insights.sbomify.com/CVE-2009-1672/): Code injection in n/a (critical 9.3)
- [CVE-2005-3583](https://insights.sbomify.com/CVE-2005-3583/): Denial of service in n/a (high 7.8)
- [CVE-2009-3879](https://insights.sbomify.com/CVE-2009-3879/): Other in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-3881 and fix it if it is affected.

What it is: CVE-2009-3881 is a high-severity vulnerability in Sun Jre, published on 9 Nov 2009. 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-2009-3881 in the wild and no public exploit code.

Affected product: Sun Jre. 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-2009-3881/ (Markdown: https://insights.sbomify.com/CVE-2009-3881/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-3881
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-3881
- OSV: https://osv.dev/vulnerability/CVE-2009-3881

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-3881/
Summaries are generated and may contain mistakes; the official description above is the record.