# CVE-2015-0207: Denial of service in n/a

> Remote attackers can crash OpenSSL DTLS servers via crafted traffic due to improper state isolation in the dtls1_listen function.

- **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:** No
- **Published:** 19 Mar 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-hj9v-2jmr-qwcf

## What is CVE-2015-0207?

CVE-2015-0207 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 19 Mar 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The dtls1_listen function in d1_lib.c in OpenSSL 1.0.2 before 1.0.2a does not properly isolate the state information of independent data streams, which allows remote attackers to cause a denial of service (application crash) via crafted DTLS traffic, as demonstrated by DTLS 1.0 traffic to a DTLS 1.2 server.

## Which versions are affected by CVE-2015-0207?

It affects 1 product.


Products: Openssl Openssl.

## How do I fix CVE-2015-0207?

No fix has been published for CVE-2015-0207 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-0207 being exploited?

There is no known exploitation of CVE-2015-0207 in the wild and no public exploit code.

## Other vulnerabilities in Openssl Openssl

- [CVE-2009-3245](https://insights.sbomify.com/CVE-2009-3245/): Null dereference in n/a (critical 10.0)
- [CVE-2006-3738](https://insights.sbomify.com/CVE-2006-3738/): Memory corruption in n/a (critical 10.0)
- [CVE-2026-63073](https://insights.sbomify.com/CVE-2026-63073/): Untrusted Sender DN Used as Format String in CMP Response Validation (critical 9.8)
- [CVE-2016-6309](https://insights.sbomify.com/CVE-2016-6309/): Use after free in n/a (critical 9.8)
- [CVE-2016-0799](https://insights.sbomify.com/CVE-2016-0799/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-0207 and fix it if it is affected.

What it is: CVE-2015-0207 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 19 Mar 2015. 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-2015-0207 in the wild and no public exploit code.

Affected product: Openssl Openssl. 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-2015-0207/ (Markdown: https://insights.sbomify.com/CVE-2015-0207/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-0207
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-0207
- OSV: https://osv.dev/vulnerability/CVE-2015-0207

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-0207/
Summaries are generated and may contain mistakes; the official description above is the record.