# CVE-2017-8449: Information disclosure in Elastic X-Pack Security

> Attackers can view restricted data fields due to flawed rule merging in Elastic X-Pack Security field-level security configurations.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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:** 16 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-wx3g-r3fp-jg5g

## What is CVE-2017-8449?

CVE-2017-8449 is a medium-severity vulnerability in Elastic X-Pack Security, published on 16 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

X-Pack Security 5.2.x would allow access to more fields than the user should have seen if the field level security rules used a mix of grant and exclude rules when merging multiple rules with field level security rules for the same index.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2017-8449?

It affects 1 product.


Products: Elastic X-Pack.

## How do I fix CVE-2017-8449?

No fix has been published for CVE-2017-8449 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-8449 being exploited?

There is no known exploitation of CVE-2017-8449 in the wild and no public exploit code.

## Other vulnerabilities in Elastic X-Pack Security

- [CVE-2018-3822](https://insights.sbomify.com/CVE-2018-3822/): Auth bypass in X-Pack Security (critical 9.8)
- [CVE-2017-8448](https://insights.sbomify.com/CVE-2017-8448/): Privilege escalation in Elastic X-Pack Alerting (high 8.8)
- [CVE-2017-8438](https://insights.sbomify.com/CVE-2017-8438/): Privilege escalation in X-Pack Security (high 8.8)
- [CVE-2017-8450](https://insights.sbomify.com/CVE-2017-8450/): Missing authorization in Elastic X-Pack Security (high 7.5)
- [CVE-2017-8447](https://insights.sbomify.com/CVE-2017-8447/): Privilege escalation in Elastic X-Pack Security (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-8449 and fix it if it is affected.

What it is: CVE-2017-8449 is a medium-severity vulnerability in Elastic X-Pack Security, published on 16 Jun 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-2017-8449 in the wild and no public exploit code.

Affected product: Elastic X-Pack Security. 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-2017-8449/ (Markdown: https://insights.sbomify.com/CVE-2017-8449/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-8449
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-8449
- OSV: https://osv.dev/vulnerability/CVE-2017-8449

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-8449/
Summaries are generated and may contain mistakes; the official description above is the record.