# CVE-2008-2545: Security feature bypass in n/a

> Attackers can bypass file extension warnings in Skype via case-sensitive checks, potentially executing arbitrary code through user-assisted file URIs.

- **Severity:** Critical 9.3 (`AV:N/AC:M/Au:N/C:C/I:C/A:C`)
- **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:** 6 Jun 2008
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-xfmx-cx9c-559m

## What is CVE-2008-2545?

CVE-2008-2545 is a critical vulnerability in n/a, published on 6 Jun 2008. 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

Skype 3.6.0.248, and other versions before 3.8.0.139, uses a case-sensitive comparison when checking for dangerous extensions, which allows user-assisted remote attackers to bypass warning dialogs and possibly execute arbitrary code via a file: URI with a dangerous extension that uses a different case.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2008-2545?

It affects 1 product.


Products: Skype Technologies Skype.

## How do I fix CVE-2008-2545?

No fix has been published for CVE-2008-2545 yet. Limit exposure of the affected software until one is available.

## Is CVE-2008-2545 being exploited?

There is no known exploitation of CVE-2008-2545 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2005-3267](https://insights.sbomify.com/CVE-2005-3267/): Integer overflow in n/a (critical 10.0)
- [CVE-2008-1805](https://insights.sbomify.com/CVE-2008-1805/): Security feature bypass in n/a (critical 9.3)
- [CVE-2005-3265](https://insights.sbomify.com/CVE-2005-3265/): Memory corruption in n/a (critical 9.3)
- [CVE-2004-1114](https://insights.sbomify.com/CVE-2004-1114/): Memory corruption in n/a (critical 9.3)
- [CVE-2006-5084](https://insights.sbomify.com/CVE-2006-5084/): Other in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2008-2545 and fix it if it is affected.

What it is: CVE-2008-2545 is a critical vulnerability in n/a, published on 6 Jun 2008. 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-2008-2545 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-2008-2545/ (Markdown: https://insights.sbomify.com/CVE-2008-2545/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2008-2545
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2008-2545
- OSV: https://osv.dev/vulnerability/CVE-2008-2545

---
From sbomify Insights: https://insights.sbomify.com/CVE-2008-2545/
Summaries are generated and may contain mistakes; the official description above is the record.