# CVE-2015-7750: Denial of service in n/a

> Remote attackers can cause a denial of service in Juniper ScreenOS firewalls by sending crafted L2TP packets.

- **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 Oct 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-xmw2-9pgq-w58j

## What is CVE-2015-7750?

CVE-2015-7750 is a medium-severity denial of service vulnerability in n/a, published on 19 Oct 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The L2TP packet processing functionality in Juniper Netscreen and ScreenOS Firewall products with ScreenOS before 6.3.0r13-dnd1, 6.3.0r14 through 6.3.0r18 before 6.3.0r18-dnc1, and 6.3.0r19 allows remote attackers to cause a denial of service via a crafted L2TP packet.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-7750?

It affects 1 product.


Products: Juniper Screenos.

## How do I fix CVE-2015-7750?

No fix has been published for CVE-2015-7750 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-7750 being exploited?

There is no known exploitation of CVE-2015-7750 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-7755](https://insights.sbomify.com/CVE-2015-7755/): Juniper ScreenOS Improper Authentication (critical 9.8, exploited in the wild)
- [CVE-2017-2336](https://insights.sbomify.com/CVE-2017-2336/): ScreenOS: XSS vulnerability in ScreenOS Firewall (critical 9.6)
- [CVE-2017-2335](https://insights.sbomify.com/CVE-2017-2335/): ScreenOS: XSS vulnerability in ScreenOS Firewall (high 8.4)
- [CVE-2017-2337](https://insights.sbomify.com/CVE-2017-2337/): ScreenOS: XSS vulnerability in ScreenOS Firewall (high 8.4)
- [CVE-2017-2338](https://insights.sbomify.com/CVE-2017-2338/): ScreenOS: XSS vulnerability in ScreenOS Firewall (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-7750 and fix it if it is affected.

What it is: CVE-2015-7750 is a medium-severity denial of service vulnerability in n/a, published on 19 Oct 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-2015-7750 in the wild and no public exploit code.

Affected product: n/a. 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-2015-7750/ (Markdown: https://insights.sbomify.com/CVE-2015-7750/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-7750
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-7750
- OSV: https://osv.dev/vulnerability/CVE-2015-7750

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-7750/
Summaries are generated and may contain mistakes; the official description above is the record.