# CVE-2009-1122: The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows re


- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 10 Jun 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-c9gf-r7p8-qf28

## What is CVE-2009-1122?

CVE-2009-1122 is a high-severity vulnerability in Microsoft Internet Information Services, published on 10 Jun 2009. 

### Official description

The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows remote attackers to bypass authentication, and possibly read or create files, via a crafted HTTP request, aka "IIS 5.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1535.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2009-1122?

It affects 1 product.


Products: Microsoft Internet Information Services.

## How do I fix CVE-2009-1122?

No fix has been published for CVE-2009-1122 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-1122 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-1122 exists.

Public exploit code:

- Microsoft IIS 6.0 - WebDAV Remote Authentication Bypass (2) (exploitdb)
- MS09-020 IIS6 WebDAV Unicode Auth Bypass Directory Scanner (metasploit)
- MS09-020 IIS6 WebDAV Unicode Authentication Bypass (metasploit)

## Other vulnerabilities in Microsoft Internet Information Services

- [CVE-2017-7269](https://insights.sbomify.com/CVE-2017-7269/): Microsoft Windows Server Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2010-3972](https://insights.sbomify.com/CVE-2010-3972/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-4301](https://insights.sbomify.com/CVE-2008-4301/): Other in n/a (critical 10.0)
- [CVE-2007-2815](https://insights.sbomify.com/CVE-2007-2815/): The "hit-highlighting" functionality in webhits.dll in Microsoft Internet Information Services (IIS) Web Server 5.0 only uses Windows NT ACL (critical 10.0)
- [CVE-2003-0224](https://insights.sbomify.com/CVE-2003-0224/): Buffer overflow in ssinc.dll for Microsoft Internet Information Services (IIS) 5.0 allows local users to execute arbitrary code via a web pa (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-1122 and fix it if it is affected.

What it is: CVE-2009-1122 is a high-severity vulnerability in Microsoft Internet Information Services, published on 10 Jun 2009. 
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-1122 exists.

Affected product: Microsoft Internet Information Services. 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-2009-1122/ (Markdown: https://insights.sbomify.com/CVE-2009-1122/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-1122
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-1122
- OSV: https://osv.dev/vulnerability/CVE-2009-1122

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From sbomify Insights: https://insights.sbomify.com/CVE-2009-1122/
Summaries are generated and may contain mistakes; the official description above is the record.