# CVE-2013-6835: Information disclosure in n/a

> Remote attackers can obtain telephone numbers or email addresses via FaceTime audio URLs in Safari without user confirmation.

- **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:** 14 Mar 2014
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-27gv-hmxx-3r2x

## What is CVE-2013-6835?

CVE-2013-6835 is a medium-severity vulnerability in Apple Iphone Os, published on 14 Mar 2014. 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

TelephonyUI Framework in Apple iOS 7 before 7.1, when Safari is used, does not require user confirmation for FaceTime audio calls, which allows remote attackers to obtain telephone number or e-mail address information via a facetime-audio: URL.

Weakness: CWE-264

## Which versions are affected by CVE-2013-6835?

It affects 1 product.


Products: Apple Iphone Os.

## How do I fix CVE-2013-6835?

No fix has been published for CVE-2013-6835 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-6835 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-6835 exists.

Public exploit code:

- Apple iOS 4.2.1 - 'facetime-audio://' Security Bypass (exploitdb)

## Other vulnerabilities in Apple Iphone Os

- [CVE-2021-30666](https://insights.sbomify.com/CVE-2021-30666/): Apple iOS WebKit Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2021-30761](https://insights.sbomify.com/CVE-2021-30761/): Apple iOS WebKit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2021-30762](https://insights.sbomify.com/CVE-2021-30762/): Apple iOS WebKit Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-4657](https://insights.sbomify.com/CVE-2016-4657/): Apple iOS Webkit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2019-7286](https://insights.sbomify.com/CVE-2019-7286/): Apple Multiple Products Memory Corruption (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-6835 and fix it if it is affected.

What it is: CVE-2013-6835 is a medium-severity vulnerability in Apple Iphone Os, published on 14 Mar 2014. 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-2013-6835 exists.

Affected product: Apple Iphone Os. 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-2013-6835/ (Markdown: https://insights.sbomify.com/CVE-2013-6835/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-6835
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-6835
- OSV: https://osv.dev/vulnerability/CVE-2013-6835

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-6835/
Summaries are generated and may contain mistakes; the official description above is the record.