# CVE-2017-9022: Denial of service in n/a

> Remote attackers can crash strongSwan via crafted certificates due to improper RSA key validation, requiring an upgrade to mitigate.

- **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:** 8 Jun 2017
- **Updated:** 3 Dec 2025
- **Also known as:** ALPINE-CVE-2017-9022, DEBIAN-CVE-2017-9022, GHSA-229r-rxf9-m7pj, UBUNTU-CVE-2017-9022

## What is CVE-2017-9022?

CVE-2017-9022 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 8 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The gmp plugin in strongSwan before 5.5.3 does not properly validate RSA public keys before calling mpz_powm_sec, which allows remote peers to cause a denial of service (floating point exception and process crash) via a crafted certificate.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2017-9022?

It affects 3 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Strongswan Strongswan.

## How do I fix CVE-2017-9022?

Upgrade to a fixed version.

## Is CVE-2017-9022 being exploited?

There is no known exploitation of CVE-2017-9022 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-2017-9022 and fix it if it is affected.

What it is: CVE-2017-9022 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 8 Jun 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-2017-9022 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-2017-9022/ (Markdown: https://insights.sbomify.com/CVE-2017-9022/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9022
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9022
- OSV: https://osv.dev/vulnerability/CVE-2017-9022

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9022/
Summaries are generated and may contain mistakes; the official description above is the record.