# CVE-2020-1469: Infinite loop in .Net Bond

> Attackers can cause a denial of service by sending improperly parsed input to applications using the Microsoft Bond library.

- **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:** 14 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rqrc-8q8f-cp9c

## What is CVE-2020-1469?

CVE-2020-1469 is a high-severity denial of service vulnerability in Microsoft Bond 9.0.1, published on 14 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A denial of service vulnerability exists when the .NET implementation of Bond improperly parses input, aka 'Bond Denial of Service Vulnerability'.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2020-1469?

2 open source packages ship an affected version, including Bond.Core.CSharp. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Bond.Core.CSharp` | NuGet | From 3.0.0 | 9.0.1 |
| `Bond.Core.CSharp` | NuGet | From 3.0.0 | 9.0.1 |

Products: Microsoft Bond.

## How do I fix CVE-2020-1469?

Upgrade Bond.Core.CSharp to 9.0.1 or later.

## Is CVE-2020-1469 being exploited?

There is no known exploitation of CVE-2020-1469 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-1469 and fix it if it is affected.

What it is: CVE-2020-1469 is a high-severity denial of service vulnerability in Microsoft Bond 9.0.1, published on 14 Jul 2020. 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-2020-1469 in the wild and no public exploit code.

Affected packages and fixed versions:
- Bond.Core.CSharp (NuGet): affected from 3.0.0; fixed in 9.0.1
- Bond.Core.CSharp (NuGet): affected from 3.0.0; fixed in 9.0.1

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-2020-1469/ (Markdown: https://insights.sbomify.com/CVE-2020-1469/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1469
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1469
- OSV: https://osv.dev/vulnerability/CVE-2020-1469

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-1469/
Summaries are generated and may contain mistakes; the official description above is the record.