# CVE-2017-14032: Auth bypass in n/a

> Remote attackers can bypass peer authentication in mbed TLS when optional authentication is enabled, using crafted X.509 certificate chains.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Aug 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-14032, DEBIAN-CVE-2017-14032, DSA-3967-1, GHSA-6v28-r64j-r4w6, MGASA-2018-0038, UBUNTU-CVE-2017-14032, openSUSE-SU-2017:2731-1, openSUSE-SU-2017:2736-1

## What is CVE-2017-14032?

CVE-2017-14032 is a high-severity authentication bypass vulnerability in Arm Mbed Tls, published on 30 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ARM mbed TLS before 1.3.21 and 2.x before 2.1.9, if optional authentication is configured, allows remote attackers to bypass peer authentication via an X.509 certificate chain with many intermediates. NOTE: although mbed TLS was formerly known as PolarSSL, the releases shipped with the PolarSSL name are not affected.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2017-14032?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mbedtls` | SUSE:Package Hub 12 | All versions | 1.3.19-8.1 |
| `mbedtls` | SUSE:Package Hub 12 | All versions | 1.3.19-8.1 |

Products: Arm Mbed Tls, Trustedfirmware Mbed Tls.

## How do I fix CVE-2017-14032?

Upgrade to a fixed version.

## Is CVE-2017-14032 being exploited?

There is no known exploitation of CVE-2017-14032 in the wild and no public exploit code.

## Other vulnerabilities in Arm Mbed Tls

- [CVE-2026-34877](https://insights.sbomify.com/CVE-2026-34877/): Deserialization in n/a (critical 9.8)
- [CVE-2022-46393](https://insights.sbomify.com/CVE-2022-46393/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-44732](https://insights.sbomify.com/CVE-2021-44732/): Use after free in n/a (critical 9.8)
- [CVE-2017-18187](https://insights.sbomify.com/CVE-2017-18187/): Integer overflow in n/a (critical 9.8)
- [CVE-2018-0487](https://insights.sbomify.com/CVE-2018-0487/): Memory corruption in ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-14032 and fix it if it is affected.

What it is: CVE-2017-14032 is a high-severity authentication bypass vulnerability in Arm Mbed Tls, published on 30 Aug 2017. 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-2017-14032 in the wild and no public exploit code.

Affected product: Arm Mbed Tls. 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-2017-14032/ (Markdown: https://insights.sbomify.com/CVE-2017-14032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-14032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-14032
- OSV: https://osv.dev/vulnerability/CVE-2017-14032

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-14032/
Summaries are generated and may contain mistakes; the official description above is the record.