# CVE-2018-8065: Denial of service in n/a

> An attacker can cause a denial of service in Flexense SyncBreeze Enterprise by sending HTTP requests with long headers or URIs, triggering a memory access violation.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-f79v-qgfc-86w3

## What is CVE-2018-8065?

CVE-2018-8065 is a high-severity denial of service vulnerability in n/a, published on 12 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the web server in Flexense SyncBreeze Enterprise 10.6.24. There is a user mode write access violation on the syncbrs.exe memory region that can be triggered by rapidly sending a variety of HTTP requests with long HTTP header values or long URIs.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-8065?

It affects 1 product.


Products: Flexense Syncbreeze.

## How do I fix CVE-2018-8065?

No fix has been published for CVE-2018-8065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-8065 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-8065 exists.

Public exploit code:

- Flexense HTTP Server <= 10.6.24 - Denial Of Service Exploit (github_poc): https://github.com/EgeBalci/CVE-2018-8065
- Flexense HTTP Server Denial Of Service (metasploit)
- Flexense HTTP Server 10.6.24 - Buffer Overflow (DoS) (Metasploit) (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2018-6537](https://insights.sbomify.com/CVE-2018-6537/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-14980](https://insights.sbomify.com/CVE-2017-14980/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-17996](https://insights.sbomify.com/CVE-2017-17996/): Memory corruption in n/a (high 8.8)
- [CVE-2020-36946](https://insights.sbomify.com/CVE-2020-36946/): SyncBreeze 10.0.28 - 'login' Denial of Service (high 8.7)
- [CVE-2020-37100](https://insights.sbomify.com/CVE-2020-37100/): Sync Breeze Enterprise 12.4.18 - Unquoted Service Path (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-8065 and fix it if it is affected.

What it is: CVE-2018-8065 is a high-severity denial of service vulnerability in n/a, published on 12 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-8065 exists.

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-2018-8065/ (Markdown: https://insights.sbomify.com/CVE-2018-8065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-8065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-8065
- OSV: https://osv.dev/vulnerability/CVE-2018-8065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-8065/
Summaries are generated and may contain mistakes; the official description above is the record.