# CVE-2017-5865: Information disclosure in n/a

> Remote attackers can enumerate valid usernames by observing distinct error messages during password reset attempts in ownCloud Server.

- **Severity:** Low 3.7 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Mar 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-96w6-55wg-2r8g

## What is CVE-2017-5865?

CVE-2017-5865 is a low-severity vulnerability in Owncloud Owncloud, published on 3 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The password reset functionality in ownCloud Server before 8.1.11, 8.2.x before 8.2.9, 9.0.x before 9.0.7, and 9.1.x before 9.1.3 sends different error messages depending on whether the username is valid, which allows remote attackers to enumerate user names via a large number of password reset attempts.

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

## Which versions are affected by CVE-2017-5865?

It affects 1 product.


Products: Owncloud Owncloud.

## How do I fix CVE-2017-5865?

No fix has been published for CVE-2017-5865 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-5865 being exploited?

There is no known exploitation of CVE-2017-5865 in the wild and no public exploit code.

## Other vulnerabilities in Owncloud Owncloud

- [CVE-2021-35946](https://insights.sbomify.com/CVE-2021-35946/): Privilege escalation in n/a (critical 9.8)
- [CVE-2014-2052](https://insights.sbomify.com/CVE-2014-2052/): XML external entity in n/a (critical 9.8)
- [CVE-2014-2048](https://insights.sbomify.com/CVE-2014-2048/): Auth bypass in n/a (critical 9.8)
- [CVE-2020-28645](https://insights.sbomify.com/CVE-2020-28645/): Path traversal in n/a (critical 9.1)
- [CVE-2015-4718](https://insights.sbomify.com/CVE-2015-4718/): Command injection in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5865 and fix it if it is affected.

What it is: CVE-2017-5865 is a low-severity vulnerability in Owncloud Owncloud, published on 3 Mar 2017. 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-2017-5865 in the wild and no public exploit code.

Affected product: Owncloud Owncloud. 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-2017-5865/ (Markdown: https://insights.sbomify.com/CVE-2017-5865/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5865
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5865
- OSV: https://osv.dev/vulnerability/CVE-2017-5865

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5865/
Summaries are generated and may contain mistakes; the official description above is the record.