# CVE-2020-36435: Data race in ruspiro-singleton

> A race condition in the ruspiro-singleton crate allows unsafe concurrent access, potentially leading to memory corruption or crashes.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:** Not needed
- **Fix available:** Yes
- **Published:** 8 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-fqq2-xp7m-xvm8, RUSTSEC-2020-0115

## What is CVE-2020-36435?

CVE-2020-36435 is a high-severity vulnerability in n/a, published on 8 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the ruspiro-singleton crate before 0.4.1 for Rust. In Singleton, Send and Sync do not have bounds checks.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2020-36435?

3 open source packages ship an affected version, including ruspiro-singleton. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ruspiro-singleton` | crates.io | All versions | 0.4.1 |
| `ruspiro-singleton` | crates.io | All versions | 0.4.1 |
| `ruspiro-singleton` | crates.io | From 0.0.0-0 | 0.4.1 |

Products: Ruspiro-Singleton Project Ruspiro-Singleton.

## How do I fix CVE-2020-36435?

Upgrade ruspiro-singleton to 0.4.1 or later.

## Is CVE-2020-36435 being exploited?

There is no known exploitation of CVE-2020-36435 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36435 and fix it if it is affected.

What it is: CVE-2020-36435 is a high-severity vulnerability in n/a, published on 8 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-36435 in the wild and no public exploit code.

Affected packages and fixed versions:
- ruspiro-singleton (crates.io): affected all versions; fixed in 0.4.1
- ruspiro-singleton (crates.io): affected all versions; fixed in 0.4.1
- ruspiro-singleton (crates.io): affected from 0.0.0-0; fixed in 0.4.1

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-2020-36435/ (Markdown: https://insights.sbomify.com/CVE-2020-36435/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36435
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36435
- OSV: https://osv.dev/vulnerability/CVE-2020-36435

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36435/
Summaries are generated and may contain mistakes; the official description above is the record.