# CVE-2020-15087: Privilege escalation in Presto

> Authenticated users can bypass authorization checks to escalate privileges in Presto servers configured with secure internal communication.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N`)
- **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:** Yes
- **Published:** 30 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f6pc-crhh-cp96

## What is CVE-2020-15087?

CVE-2020-15087 is a high-severity missing authorization vulnerability in prestosql Presto, published on 30 Jun 2020. 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

In Presto before version 337, authenticated users can bypass authorization checks by directly accessing internal APIs. This impacts Presto server installations with secure internal communication configured. This does not affect installations that have not configured secure internal communication, as these installations are inherently insecure. This only affects Presto server installations. This does NOT affect clients such as the CLI or JDBC driver. This vulnerability has been fixed in version 337. Additionally, this issue can be mitigated by blocking network access to internal APIs on the coordinator and workers.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2020-15087?

2 open source packages ship an affected version, including io.prestosql:presto-server. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `io.prestosql:presto-server` | Maven | All versions | 337 |
| `io.prestosql:presto-server` | Maven | All versions | 337 |

Products: Prestosql Presto.

## How do I fix CVE-2020-15087?

Upgrade io.prestosql:presto-server to 337 or later.

## Is CVE-2020-15087 being exploited?

There is no known exploitation of CVE-2020-15087 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15087 and fix it if it is affected.

What it is: CVE-2020-15087 is a high-severity missing authorization vulnerability in prestosql Presto, published on 30 Jun 2020. 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-2020-15087 in the wild and no public exploit code.

Affected packages and fixed versions:
- io.prestosql:presto-server (Maven): affected all versions; fixed in 337
- io.prestosql:presto-server (Maven): affected all versions; fixed in 337

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-2020-15087/ (Markdown: https://insights.sbomify.com/CVE-2020-15087/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15087
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15087
- OSV: https://osv.dev/vulnerability/CVE-2020-15087

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15087/
Summaries are generated and may contain mistakes; the official description above is the record.