# CVE-2010-0416: Memory corruption in n/a

> Remote attackers can cause a crash or execute arbitrary code in Helix Player and RealPlayer by providing a malformed URL with an invalid percent-encoding sequence.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/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:** Yes
- **Published:** 18 Feb 2010
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-mcf9-pq3p-q6q8

## What is CVE-2010-0416?

CVE-2010-0416 is a high-severity memory corruption vulnerability in Realnetworks Realplayer, published on 18 Feb 2010. 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

Buffer overflow in the Unescape function in common/util/hxurl.cpp and player/hxclientkit/src/CHXClientSink.cpp in Helix Player 1.0.6 and RealPlayer allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a URL argument containing a % (percent) character that is not followed by two hex digits.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2010-0416?

It affects 2 products.


Products: Realnetworks Helix Player, Realnetworks Realplayer.

## How do I fix CVE-2010-0416?

Apply the vendor's patch.

## Is CVE-2010-0416 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-0416 exists.

Public exploit code:

- Helix Player 11.0.2 - Encoded URI Processing Buffer Overflow (exploitdb)

## Other vulnerabilities in Realnetworks Realplayer

- [CVE-2009-4241](https://insights.sbomify.com/CVE-2009-4241/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-4242](https://insights.sbomify.com/CVE-2009-4242/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-4243](https://insights.sbomify.com/CVE-2009-4243/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-4244](https://insights.sbomify.com/CVE-2009-4244/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-4245](https://insights.sbomify.com/CVE-2009-4245/): Memory corruption in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2010-0416 and fix it if it is affected.

What it is: CVE-2010-0416 is a high-severity memory corruption vulnerability in Realnetworks Realplayer, published on 18 Feb 2010. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-0416 exists.

Affected product: Realnetworks Realplayer. 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-2010-0416/ (Markdown: https://insights.sbomify.com/CVE-2010-0416/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2010-0416
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2010-0416
- OSV: https://osv.dev/vulnerability/CVE-2010-0416

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From sbomify Insights: https://insights.sbomify.com/CVE-2010-0416/
Summaries are generated and may contain mistakes; the official description above is the record.