# CVE-2019-15511: Privilege escalation in n/a

> Local attackers can gain SYSTEM privileges by sending unauthenticated TCP packets to the GOG Galaxy service due to improper access control.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Nov 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-27xc-49hc-r9xm

## What is CVE-2019-15511?

CVE-2019-15511 is a high-severity vulnerability in n/a, published on 21 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An exploitable local privilege escalation vulnerability exists in the GalaxyClientService installed by GOG Galaxy. Due to Improper Access Control, an attacker can send unauthenticated local TCP packets to the service to gain SYSTEM privileges in Windows system where GOG Galaxy software is installed. All GOG Galaxy versions before 1.2.60 and all corresponding versions of GOG Galaxy 2.0 Beta are affected.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2019-15511?

It affects 1 product.


Products: Gog Galaxy.

## How do I fix CVE-2019-15511?

No fix has been published for CVE-2019-15511 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-15511 being exploited?

There is no known exploitation of CVE-2019-15511 in the wild and no public exploit code.

Public exploit code:

- GOG Galaxy Exploit for CVE-2019-15511 (github_poc): https://github.com/adenkiewicz/CVE-2019-15511

## Other vulnerabilities in n/a

- [CVE-2018-4048](https://insights.sbomify.com/CVE-2018-4048/): Privilege escalation in GOG Galaxy (critical 9.3)
- [CVE-2018-3974](https://insights.sbomify.com/CVE-2018-3974/): Privilege escalation in GOG Galaxy (critical 9.3)
- [CVE-2018-4049](https://insights.sbomify.com/CVE-2018-4049/): Privilege escalation in GOG Galaxy (critical 9.3)
- [CVE-2020-7352](https://insights.sbomify.com/CVE-2020-7352/): GOG Galaxy GalaxyClientService Privilege Escalation (high 8.4)
- [CVE-2022-31262](https://insights.sbomify.com/CVE-2022-31262/): Privilege escalation in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15511 and fix it if it is affected.

What it is: CVE-2019-15511 is a high-severity vulnerability in n/a, published on 21 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-15511 in the wild and no public exploit code.

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-2019-15511/ (Markdown: https://insights.sbomify.com/CVE-2019-15511/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15511
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15511
- OSV: https://osv.dev/vulnerability/CVE-2019-15511

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15511/
Summaries are generated and may contain mistakes; the official description above is the record.