# CVE-2009-3877: Denial of service in n/a

> Remote attackers can cause denial of service via crafted HTTP headers exploiting ASN.1 parser flaws in Java SE.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/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:** 5 Nov 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-23vf-7h8p-j4qp

## What is CVE-2009-3877?

CVE-2009-3877 is a medium-severity denial of service vulnerability in Sun Jdk, published on 5 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unspecified vulnerability in Sun Java SE in JDK and JRE 5.0 before Update 22, JDK and JRE 6 before Update 17, SDK and JRE 1.3.x before 1.3.1_27, and SDK and JRE 1.4.x before 1.4.2_24 allows remote attackers to cause a denial of service (memory consumption) via crafted HTTP headers, which are not properly parsed by the ASN.1 DER input stream parser, aka Bug Id 6864911.

Weakness: CWE-399

## Which versions are affected by CVE-2009-3877?

It affects 3 products.


Products: Sun Jdk, Sun Jre, Sun Sdk.

## How do I fix CVE-2009-3877?

Upgrade to a fixed version.

## Is CVE-2009-3877 being exploited?

There is no known exploitation of CVE-2009-3877 in the wild and no public exploit code.

## Other vulnerabilities in Sun Jdk

- [CVE-2011-3521](https://insights.sbomify.com/CVE-2011-3521/): Deserialization in n/a (critical 10.0)
- [CVE-2011-3548](https://insights.sbomify.com/CVE-2011-3548/): Other in n/a (critical 10.0)
- [CVE-2011-3549](https://insights.sbomify.com/CVE-2011-3549/): Other in n/a (critical 10.0)
- [CVE-2011-3554](https://insights.sbomify.com/CVE-2011-3554/): Other in n/a (critical 10.0)
- [CVE-2011-0802](https://insights.sbomify.com/CVE-2011-0802/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-3877 and fix it if it is affected.

What it is: CVE-2009-3877 is a medium-severity denial of service vulnerability in Sun Jdk, published on 5 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-2009-3877 in the wild and no public exploit code.

Affected product: Sun Jdk. 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-2009-3877/ (Markdown: https://insights.sbomify.com/CVE-2009-3877/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-3877
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-3877
- OSV: https://osv.dev/vulnerability/CVE-2009-3877

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-3877/
Summaries are generated and may contain mistakes; the official description above is the record.