# CVE-2017-6594: Security feature bypass in n/a

> Attackers can bypass Kerberos transit path validation policies by exploiting a flaw in ticket issuance logic, potentially circumventing realm restrictions.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 28 Aug 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-6594, GHSA-jg5g-qq45-3g4q, MGASA-2017-0308, UBUNTU-CVE-2017-6594

## What is CVE-2017-6594?

CVE-2017-6594 is a high-severity vulnerability in Opensuse Leap, published on 28 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging failure to add the previous hop realm to the transit path of issued tickets.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2017-6594?

It affects 2 products.


Products: Heimdal Project Heimdal, Opensuse Leap.

## How do I fix CVE-2017-6594?

Upgrade to a fixed version.

## Is CVE-2017-6594 being exploited?

There is no known exploitation of CVE-2017-6594 in the wild and no public exploit code.

## Other vulnerabilities in Opensuse Leap

- [CVE-2022-44640](https://insights.sbomify.com/CVE-2022-44640/): Use after free in n/a (critical 9.8)
- [CVE-2022-42898](https://insights.sbomify.com/CVE-2022-42898/): Integer overflow in n/a (high 8.8)
- [CVE-2022-3116](https://insights.sbomify.com/CVE-2022-3116/): Null dereference in Heimdal Software Kerberos (high 7.5)
- [CVE-2022-45142](https://insights.sbomify.com/CVE-2022-45142/): Security feature bypass in Samba (high 7.5)
- [CVE-2021-44758](https://insights.sbomify.com/CVE-2021-44758/): Null dereference in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-6594 and fix it if it is affected.

What it is: CVE-2017-6594 is a high-severity vulnerability in Opensuse Leap, published on 28 Aug 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-2017-6594 in the wild and no public exploit code.

Affected product: Opensuse Leap. 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-2017-6594/ (Markdown: https://insights.sbomify.com/CVE-2017-6594/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6594
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6594
- OSV: https://osv.dev/vulnerability/CVE-2017-6594

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-6594/
Summaries are generated and may contain mistakes; the official description above is the record.