## Description

Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the "established" keyword.

## Severity

Overall Severity: N/A

### CVSS Metrics

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

## Affected Products

### cisco - ios

Affected Versions:

- 8.2

### cisco - ios

Affected Versions:

- 8.3

### cisco - ios

Affected Versions:

- 9.0

### cisco - ios

Affected Versions:

- 9.1

## References

- http://www.cert.org/advisories/CA-1992-20.html
  Patch Third Party Advisory US Government Resource
- http://www.securityfocus.com/bid/53
  Patch Vendor Advisory
- http://www.cert.org/advisories/CA-1992-20.html
  Patch Third Party Advisory US Government Resource
- http://www.securityfocus.com/bid/53
  Patch Vendor Advisory

Neural Processor Active