# CVE-2020-15529: Privilege escalation in n/a

> Local attackers can escalate privileges via weak file permissions and opportunistic locks during game installation or repair in GOG Galaxy Client.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-cj35-hhr2-7qgh

## What is CVE-2020-15529?

CVE-2020-15529 is a high-severity vulnerability in n/a, published on 5 Jul 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in GOG Galaxy Client 2.0.17. Local escalation of privileges is possible when a user installs a game or performs a verify/repair operation. The issue exists because of weak file permissions and can be exploited by using opportunistic locks.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource), CWE-667 (Improper Locking)

## Which versions are affected by CVE-2020-15529?

It affects 1 product.


Products: Gog Galaxy.

## How do I fix CVE-2020-15529?

No fix has been published for CVE-2020-15529 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-15529 being exploited?

There is no known exploitation of CVE-2020-15529 in the wild and no public exploit code.

## 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-2020-15529 and fix it if it is affected.

What it is: CVE-2020-15529 is a high-severity vulnerability in n/a, published on 5 Jul 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-15529 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-2020-15529/ (Markdown: https://insights.sbomify.com/CVE-2020-15529/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15529
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15529
- OSV: https://osv.dev/vulnerability/CVE-2020-15529

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15529/
Summaries are generated and may contain mistakes; the official description above is the record.