# CVE-2023-40356: PingOne MFA Integration Kit MFA bypass

> Attackers with first-factor credentials can bypass MFA to register their own device and take over user accounts in PingOne MFA Integration Kit.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jul 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-5hj4-9975-4r5m

## What is CVE-2023-40356?

CVE-2023-40356 is a high-severity authentication bypass vulnerability in PingOne MFA Integration Kit for PingFederate, published on 9 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PingOne MFA Integration Kit contains a vulnerability related to the Prompt Users to Set Up MFA configuration. Under certain conditions, this configuration could allow for a new MFA device to be paired with a target user account without requiring second-factor authentication from the target’s existing registered devices. A threat actor might be able to exploit this vulnerability to register their own MFA device with a target user’s account if they have existing knowledge of the target user’s first factor credential.

Weakness: CWE-290 (Authentication Bypass by Spoofing)

## Which versions are affected by CVE-2023-40356?


## How do I fix CVE-2023-40356?

No fix has been published for CVE-2023-40356 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-40356 being exploited?

There is no known exploitation of CVE-2023-40356 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40356 and fix it if it is affected.

What it is: CVE-2023-40356 is a high-severity authentication bypass vulnerability in PingOne MFA Integration Kit for PingFederate, published on 9 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-40356 in the wild and no public exploit code.

Affected product: PingOne MFA Integration Kit for PingFederate. 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-2023-40356/ (Markdown: https://insights.sbomify.com/CVE-2023-40356/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40356
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40356
- OSV: https://osv.dev/vulnerability/CVE-2023-40356

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-40356/
Summaries are generated and may contain mistakes; the official description above is the record.