# CVE-2003-0567

## Summary

- **CVE ID:** CVE-2003-0567
- **Severity:** UNKNOWN
- **CVSS Score:** 0.99
- **CWE:** N/A
- **Published:** Jul 25, 2003
- **Last Modified:** Mar 16, 2026

## Description

Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.kb.cert.org/vuls/id/411332)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603)
- [CNA](http://www.cert.org/advisories/CA-2003-17.html)
- [CNA](http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml)
- [CNA](http://www.cert.org/advisories/CA-2003-15.html)
- [CNA](http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006743.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 24.63%
- **EPSS Percentile:** 96.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._