# CVE-2017-17432: Denial of service in n/a

> Remote attackers can cause a system or application crash in OpenAFS by sending crafted Rx ack packets, leading to denial of service.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 6 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-17432, DLA-1213-1, DSA-4067-1, GHSA-f7jc-5gw7-phrf, MGASA-2018-0065, UBUNTU-CVE-2017-17432

## What is CVE-2017-17432?

CVE-2017-17432 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 6 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

OpenAFS 1.x before 1.6.22 does not properly validate Rx ack packets, which allows remote attackers to cause a denial of service (system crash or application crash) via crafted fields, as demonstrated by an integer underflow and assertion failure for a small MTU value.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2017-17432?

It affects 2 products.


Products: Debian Debian Linux, Openafs Openafs.

## How do I fix CVE-2017-17432?

Upgrade to a fixed version.

## Is CVE-2017-17432 being exploited?

There is no known exploitation of CVE-2017-17432 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
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- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-17432 and fix it if it is affected.

What it is: CVE-2017-17432 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 6 Dec 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-2017-17432 in the wild and no public exploit code.

Affected product: Debian Debian 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-2017-17432/ (Markdown: https://insights.sbomify.com/CVE-2017-17432/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-17432
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-17432
- OSV: https://osv.dev/vulnerability/CVE-2017-17432

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-17432/
Summaries are generated and may contain mistakes; the official description above is the record.