# CVE-2013-7440: The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, w


- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 7 Jun 2016
- **Updated:** 6 Aug 2024
- **Also known as:** AZL-109599, DEBIAN-CVE-2013-7440, GHSA-v6fx-m8cj-52v3, PSF-2016-1, SUSE-SU-2015:1298-1, SUSE-SU-2015:1651-1

## What is CVE-2013-7440?

CVE-2013-7440 is a medium-severity vulnerability in Python Python, published on 7 Jun 2016. 

### Official description

The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.

Weakness: CWE-19

## Which versions are affected by CVE-2013-7440?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `python-setuptools` | SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5 | All versions | 1.1.7-7.1 |
| `python-setuptools` | SUSE:Enterprise Storage 1.0 | All versions | 1.1.7-7.1 |
| `python-setuptools` | SUSE:Linux Enterprise Desktop 11 SP3 | All versions | 0.6c11-6.1 |
| `python-setuptools` | SUSE:Linux Enterprise Desktop 11 SP4 | All versions | 0.6c11-6.1 |
| `python-setuptools` | SUSE:Linux Enterprise Module for Containers 12 | All versions | 1.1.7-7.1 |
| `python-setuptools` | SUSE:Linux Enterprise Module for Public Cloud 12 | All versions | 1.1.7-7.1 |
| `python-setuptools` | SUSE:Linux Enterprise Software Development Kit 11 SP3 | All versions | 0.6c11-6.1 |
| `python-setuptools` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 0.6c11-6.1 |
| `python-setuptools` | SUSE:Linux Enterprise Software Development Kit 12 | All versions | 1.1.7-7.1 |

Products: Python Python.

## How do I fix CVE-2013-7440?

Upgrade to a fixed version.

## Is CVE-2013-7440 being exploited?

There is no known exploitation of CVE-2013-7440 in the wild and no public exploit code.

## Other vulnerabilities in Python Python

- [CVE-2008-5031](https://insights.sbomify.com/CVE-2008-5031/): Integer overflow in n/a (critical 10.0)
- [CVE-2014-4650](https://insights.sbomify.com/CVE-2014-4650/): Path traversal in n/a (critical 9.8)
- [CVE-2016-5636](https://insights.sbomify.com/CVE-2016-5636/): Integer overflow in n/a (critical 9.8)
- [CVE-2007-4559](https://insights.sbomify.com/CVE-2007-4559/): Path traversal in n/a (critical 9.8)
- [CVE-2017-17522](https://insights.sbomify.com/CVE-2017-17522/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-7440 and fix it if it is affected.

What it is: CVE-2013-7440 is a medium-severity vulnerability in Python Python, published on 7 Jun 2016. 
Exploitation: There is no known exploitation of CVE-2013-7440 in the wild and no public exploit code.

Affected product: Python Python. 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-2013-7440/ (Markdown: https://insights.sbomify.com/CVE-2013-7440/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-7440
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-7440
- OSV: https://osv.dev/vulnerability/CVE-2013-7440

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-7440/
Summaries are generated and may contain mistakes; the official description above is the record.