# CVE-2011-3427: Weak cryptography in n/a

> Weak MD5 usage in iOS certificates allows man-in-the-middle attackers to spoof servers and access sensitive data.

- **Severity:** Low 2.6 (`AV:N/AC:H/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:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-q64w-j52m-r9m5

## What is CVE-2011-3427?

CVE-2011-3427 is a low-severity vulnerability in Apple Iphone Os, published on 14 Oct 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Data Security component in Apple iOS before 5 and Apple TV before 4.4 does not properly restrict use of the MD5 hash algorithm within X.509 certificates, which makes it easier for man-in-the-middle attackers to spoof servers or obtain sensitive information via a crafted certificate.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2011-3427?

It affects 2 products.


Products: Apple Apple Tv, Apple Iphone Os.

## How do I fix CVE-2011-3427?

No fix has been published for CVE-2011-3427 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-3427 being exploited?

There is no known exploitation of CVE-2011-3427 in the wild and no public exploit code.

## Other vulnerabilities in Apple Iphone Os

- [CVE-2018-4189](https://insights.sbomify.com/CVE-2018-4189/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-4298](https://insights.sbomify.com/CVE-2018-4298/): Missing authorization in n/a (critical 9.8)
- [CVE-2018-4085](https://insights.sbomify.com/CVE-2018-4085/): Memory corruption in n/a (high 8.8)
- [CVE-2018-4088](https://insights.sbomify.com/CVE-2018-4088/): Memory corruption in n/a (high 8.8)
- [CVE-2018-4089](https://insights.sbomify.com/CVE-2018-4089/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-3427 and fix it if it is affected.

What it is: CVE-2011-3427 is a low-severity vulnerability in Apple Iphone Os, published on 14 Oct 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2011-3427 in the wild and no public exploit code.

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-2011-3427/ (Markdown: https://insights.sbomify.com/CVE-2011-3427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-3427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-3427
- OSV: https://osv.dev/vulnerability/CVE-2011-3427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-3427/
Summaries are generated and may contain mistakes; the official description above is the record.