# CVE-2006-3873: Memory corruption in n/a

> Remote attackers can execute arbitrary code or cause a crash in Internet Explorer via a malicious GZIP-encoded URL redirect.

- **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:** No
- **Published:** 12 Sep 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-p2jw-xr8p-fh9v

## What is CVE-2006-3873?

CVE-2006-3873 is a high-severity memory corruption vulnerability in Microsoft Ie, published on 12 Sep 2006. 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

Heap-based buffer overflow in URLMON.DLL in Microsoft Internet Explorer 6 SP1 on Windows 2000 and XP SP1, with versions the MS06-042 patch before 20060912, allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long URL in a GZIP-encoded website that was the target of an HTTP redirect, due to an incomplete fix for CVE-2006-3869.

## Which versions are affected by CVE-2006-3873?

It affects 4 products.


Products: Microsoft Ie, Microsoft Windows 2000, Microsoft Windows 2003 Server, Microsoft Windows Xp.

## How do I fix CVE-2006-3873?

No fix has been published for CVE-2006-3873 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-3873 being exploited?

There is no known exploitation of CVE-2006-3873 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Ie

- [CVE-2007-0217](https://insights.sbomify.com/CVE-2007-0217/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-0219](https://insights.sbomify.com/CVE-2007-0219/): Code injection in n/a (critical 10.0)
- [CVE-2006-1186](https://insights.sbomify.com/CVE-2006-1186/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0985](https://insights.sbomify.com/CVE-2004-0985/): Code injection in n/a (critical 10.0)
- [CVE-2004-0216](https://insights.sbomify.com/CVE-2004-0216/): Integer overflow in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-3873 and fix it if it is affected.

What it is: CVE-2006-3873 is a high-severity memory corruption vulnerability in Microsoft Ie, published on 12 Sep 2006. 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-2006-3873 in the wild and no public exploit code.

Affected product: Microsoft Ie. 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-2006-3873/ (Markdown: https://insights.sbomify.com/CVE-2006-3873/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-3873
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-3873
- OSV: https://osv.dev/vulnerability/CVE-2006-3873

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-3873/
Summaries are generated and may contain mistakes; the official description above is the record.