# CVE-2011-0990: Race condition in n/a

> Remote attackers can cause denial of service or bypass security checks in Mono via a race condition in Array.Copy triggered by crafted media files.

- **Severity:** Medium 5.8 (`AV:N/AC:M/Au:N/C:N/I:P/A:P`)
- **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:** No
- **Published:** 13 Apr 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-c2pm-4p8q-67xh

## What is CVE-2011-0990?

CVE-2011-0990 is a medium-severity vulnerability in n/a, published on 13 Apr 2011. 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

Race condition in the FastCopy optimization in the Array.Copy method in metadata/icall.c in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to trigger a buffer overflow and modify internal data structures, and cause a denial of service (plugin crash) or corrupt the internal state of the security manager, via a crafted media file in which a thread makes a change after a type check but before a copy action.

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

## Which versions are affected by CVE-2011-0990?

It affects 2 products.


Products: Mono Mono, Novell Moonlight.

## How do I fix CVE-2011-0990?

No fix has been published for CVE-2011-0990 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-0990 being exploited?

There is no known exploitation of CVE-2011-0990 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2010-4254](https://insights.sbomify.com/CVE-2010-4254/): Code injection in n/a (high 7.5)
- [CVE-2007-5197](https://insights.sbomify.com/CVE-2007-5197/): Memory corruption in n/a (high 7.5)
- [CVE-2010-4159](https://insights.sbomify.com/CVE-2010-4159/): Path traversal in n/a (medium 6.9)
- [CVE-2011-0991](https://insights.sbomify.com/CVE-2011-0991/): Use after free in n/a (medium 6.8)
- [CVE-2006-5072](https://insights.sbomify.com/CVE-2006-5072/): Path traversal in n/a (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-0990 and fix it if it is affected.

What it is: CVE-2011-0990 is a medium-severity vulnerability in n/a, published on 13 Apr 2011. 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-2011-0990 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-2011-0990/ (Markdown: https://insights.sbomify.com/CVE-2011-0990/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0990
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0990
- OSV: https://osv.dev/vulnerability/CVE-2011-0990

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-0990/
Summaries are generated and may contain mistakes; the official description above is the record.