# CVE-2022-40617: Denial of service in n/a

> Remote attackers can cause a denial of service in strongSwan by sending crafted certificates with malicious CRL/OCSP URLs.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:** 31 Oct 2022
- **Updated:** 6 May 2025
- **Also known as:** ALPINE-CVE-2022-40617, AZL-11398, DEBIAN-CVE-2022-40617, DLA-3143-1, DSA-5249-1, GHSA-f2x8-4jwf-gqrg, OESA-2022-2034, SUSE-SU-2022:4159-1, SUSE-SU-2022:4185-1, SUSE-SU-2022:4197-1, UBUNTU-CVE-2022-40617, USN-5651-1, USN-5651-2

## What is CVE-2022-40617?

CVE-2022-40617 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 31 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-40617?

It affects 5 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `strongswan` | SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 5.8.2-150200.11.30.1 |
| `strongswan` | SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 5.8.2-150400.19.3.3 |
| `strongswan` | SUSE:Linux Enterprise Module for Package Hub 15 SP3 | All versions | 5.8.2-150200.11.30.1 |
| `strongswan` | SUSE:Linux Enterprise Module for Package Hub 15 SP4 | All versions | 5.8.2-150400.19.3.3 |
| `strongswan` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 5.1.3-26.23.1 |
| `strongswan` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 5.1.3-26.23.1 |
| `strongswan` | SUSE:Linux Enterprise Workstation Extension 15 SP3 | All versions | 5.8.2-150200.11.30.1 |
| `strongswan` | SUSE:Linux Enterprise Workstation Extension 15 SP4 | All versions | 5.8.2-150400.19.3.3 |
| `strongswan` | openSUSE:Leap 15.3 | All versions | 5.8.2-150200.11.30.1 |
| `strongswan` | openSUSE:Leap 15.4 | All versions | 5.8.2-150400.19.3.3 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Stormshield Stormshield Network Security, Strongswan Strongswan.

## How do I fix CVE-2022-40617?

Upgrade to a fixed version.

## Is CVE-2022-40617 being exploited?

There is no known exploitation of CVE-2022-40617 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-40617 and fix it if it is affected.

What it is: CVE-2022-40617 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 31 Oct 2022. 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-2022-40617 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2022-40617/ (Markdown: https://insights.sbomify.com/CVE-2022-40617/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-40617
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-40617
- OSV: https://osv.dev/vulnerability/CVE-2022-40617

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-40617/
Summaries are generated and may contain mistakes; the official description above is the record.