# CVE-2019-25072: Uncontrolled resource consumption in github.com/tendermint/tendermint

> A malicious server can cause a client to consume excessive resources via Gzip compression and unbounded responses, leading to denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Dec 2022
- **Updated:** 11 Apr 2025
- **Also known as:** GHSA-3fm3-m23v-5r46, GO-2020-0037

## What is CVE-2019-25072?

CVE-2019-25072 is a high-severity denial of service vulnerability in github.com/tendermint/tendermint/rpc/lib/client, published on 27 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Due to support of Gzip compression in request bodies, as well as a lack of limiting response body sizes, a malicious server can cause a client to consume a significant amount of system resources, which may be used as a denial of service vector.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2019-25072?

3 open source packages ship an affected version, including github.com/tendermint/tendermint. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/tendermint/tendermint` | Go | All versions | 0.31.1 |
| `github.com/tendermint/tendermint` | Go | All versions | 0.31.1 |
| `github.com/tendermint/tendermint` | Go | All versions | 0.31.1 |

Products: Tendermint Tendermint.

## How do I fix CVE-2019-25072?

Upgrade github.com/tendermint/tendermint to 0.31.1 or later.

## Is CVE-2019-25072 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25072 exists.

## Other vulnerabilities in github.com/tendermint/tendermint/rpc/lib/client

- [CVE-2021-21271](https://insights.sbomify.com/CVE-2021-21271/): Denial of service in TenderMint Core (medium 6.5)
- [CVE-2020-15091](https://insights.sbomify.com/CVE-2020-15091/): Denial of Service in TenderMint (medium 6.5)
- [CVE-2020-5303](https://insights.sbomify.com/CVE-2020-5303/): Denial of service in Tendermint (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25072 and fix it if it is affected.

What it is: CVE-2019-25072 is a high-severity denial of service vulnerability in github.com/tendermint/tendermint/rpc/lib/client, published on 27 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25072 exists.

Affected packages and fixed versions:
- github.com/tendermint/tendermint (Go): affected all versions; fixed in 0.31.1
- github.com/tendermint/tendermint (Go): affected all versions; fixed in 0.31.1
- github.com/tendermint/tendermint (Go): affected all versions; fixed in 0.31.1

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-2019-25072/ (Markdown: https://insights.sbomify.com/CVE-2019-25072/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25072
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25072
- OSV: https://osv.dev/vulnerability/CVE-2019-25072

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-25072/
Summaries are generated and may contain mistakes; the official description above is the record.