# CVE-2012-6399: Security feature bypass in n/a

> Man-in-the-middle attackers can spoof SSL servers and intercept data because the Cisco WebEx iOS app fails to verify server hostnames against X.509 certificates.

- **Severity:** Medium 5.8 (`AV:N/AC:M/Au:N/C:P/I:P/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:** 27 May 2013
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-h5x3-v9f7-g9fh

## What is CVE-2012-6399?

CVE-2012-6399 is a medium-severity vulnerability in n/a, published on 27 May 2013. 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

Cisco WebEx 4.1 on iOS does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, aka Bug ID CSCud94176.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2012-6399?

It affects 1 product.


Products: Cisco Webex.

## How do I fix CVE-2012-6399?

No fix has been published for CVE-2012-6399 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-6399 being exploited?

There is no known exploitation of CVE-2012-6399 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2009-2875](https://insights.sbomify.com/CVE-2009-2875/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-2876](https://insights.sbomify.com/CVE-2009-2876/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-2877](https://insights.sbomify.com/CVE-2009-2877/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-2878](https://insights.sbomify.com/CVE-2009-2878/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-2879](https://insights.sbomify.com/CVE-2009-2879/): Memory corruption in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-6399 and fix it if it is affected.

What it is: CVE-2012-6399 is a medium-severity vulnerability in n/a, published on 27 May 2013. 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-2012-6399 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-2012-6399/ (Markdown: https://insights.sbomify.com/CVE-2012-6399/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-6399
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-6399
- OSV: https://osv.dev/vulnerability/CVE-2012-6399

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-6399/
Summaries are generated and may contain mistakes; the official description above is the record.