## Description

Cisco IOS 9.1 and earlier does not properly handle extended IP access lists when the IP route cache is enabled and the "established" keyword is set, which could allow attackers to bypass filters.

## Severity

Overall Severity: N/A

### CVSS Metrics

Type | Score | Severity | Vector
--- | --- | --- | ---

## Affected Products

### cisco - ios

Affected Versions:

- *

## References

- http://www.cert.org/advisories/CA-1992-20.html
  Patch Third Party Advisory US Government Resource
- http://www.cert.org/advisories/CA-1992-20.html
  Patch Third Party Advisory US Government Resource

Neural Processor Active