# CVE-2019-6584: Security feature bypass in SIEMENS LOGO!8

> Attackers can reuse valid session IDs after user logout to maintain unauthorized access to the Siemens LOGO!8 web interface.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Jun 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-ggxx-jp5j-2gq2

## What is CVE-2019-6584?

CVE-2019-6584 is a high-severity vulnerability in SIEMENS LOGO!8, published on 12 Jun 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SIEMENS LOGO!8 (6ED1052-xyyxx-0BA8 FS:01 to FS:06 / Firmware version V1.80.xx and V1.81.xx), SIEMENS LOGO!8 (6ED1052-xyy08-0BA0 FS:01 / Firmware version < V1.82.02). The integrated webserver does not invalidate the Session ID upon user logout. An attacker that successfully extracted a valid Session ID is able to use it even after the user logs out. The security vulnerability could be exploited by an attacker in a privileged network position who is able to read the communication between the affected device and the user or by an attacker who is able to obtain valid Session IDs through other means. The user must invoke a session to the affected device. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration), CWE-384 (Session Fixation)

## Which versions are affected by CVE-2019-6584?

It affects 1 product.


Products: Siemens Logo\!8 Firmware.

## How do I fix CVE-2019-6584?

No fix has been published for CVE-2019-6584 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6584 being exploited?

There is no known exploitation of CVE-2019-6584 in the wild and no public exploit code.

## Other vulnerabilities in SIEMENS LOGO!8

- [CVE-2019-6571](https://insights.sbomify.com/CVE-2019-6571/): Denial of service in SIEMENS LOGO!8 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6584 and fix it if it is affected.

What it is: CVE-2019-6584 is a high-severity vulnerability in SIEMENS LOGO!8, published on 12 Jun 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-6584 in the wild and no public exploit code.

Affected product: SIEMENS LOGO!8. 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-2019-6584/ (Markdown: https://insights.sbomify.com/CVE-2019-6584/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6584
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6584
- OSV: https://osv.dev/vulnerability/CVE-2019-6584

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-6584/
Summaries are generated and may contain mistakes; the official description above is the record.