# CVE-1999-1110: Information disclosure in n/a

> Remote attackers can determine the existence of local files on a client by observing specific error codes returned by Windows Media Player ActiveX in Internet Explorer.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **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:** 12 Sep 2001
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-mhq8-h8mw-8cgr

## What is CVE-1999-1110?

CVE-1999-1110 is a medium-severity vulnerability in Microsoft Internet Explorer, published on 12 Sep 2001. 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

Windows Media Player ActiveX object as used in Internet Explorer 5.0 returns a specific error code when a file does not exist, which allows remote malicious web sites to determine the existence of files on the client.

## Which versions are affected by CVE-1999-1110?

It affects 1 product.


Products: Microsoft Internet Explorer.

## How do I fix CVE-1999-1110?

No fix has been published for CVE-1999-1110 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-1110 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-1999-1110 exists.

Public exploit code:

- Microsoft Internet Explorer 5 Media Player - ActiveX Error Message (exploitdb)

## Other vulnerabilities in Microsoft Internet Explorer

- [CVE-2014-1776](https://insights.sbomify.com/CVE-2014-1776/): Microsoft Internet Explorer Memory Corruption (critical 9.8, exploited in the wild)
- [CVE-2021-27085](https://insights.sbomify.com/CVE-2021-27085/): Microsoft Internet Explorer Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2017-0222](https://insights.sbomify.com/CVE-2017-0222/): Microsoft Internet Explorer Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2017-0210](https://insights.sbomify.com/CVE-2017-0210/): Microsoft Internet Explorer Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2017-0149](https://insights.sbomify.com/CVE-2017-0149/): Microsoft Internet Explorer Memory Corruption (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-1110 and fix it if it is affected.

What it is: CVE-1999-1110 is a medium-severity vulnerability in Microsoft Internet Explorer, published on 12 Sep 2001. 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-1999-1110 exists.

Affected product: Microsoft Internet Explorer. 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-1999-1110/ (Markdown: https://insights.sbomify.com/CVE-1999-1110/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-1110
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-1110
- OSV: https://osv.dev/vulnerability/CVE-1999-1110

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-1110/
Summaries are generated and may contain mistakes; the official description above is the record.