CVE-2005-4499

Original summary

Normalized public record · Updated Nov 3, 2026

The Downloadable RADIUS ACLs feature in Cisco PIX and VPN 3000 concentrators, when creating an ACL on the Cisco Secure Access Control Server (CS ACS), generates a random internal name for an ACL that is also used as a hidden user name and password, which allows remote attackers to gain privileges by sniffing the username from the cleartext portion of a RADIUS session, then using the password to log in to another device that uses CS ACS.

Publisher and source text is retained separately from QFinch interpretation.

Affected products

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

1. Confirm the affected product and reachable code path exist in your environment.
2. Apply the vendor-supported patch or mitigation from the primary advisory.
3. Rescan the exact deployed revision and retain verification evidence.

Evidence coverage

SSVC priority

LOW

Confidence

Not available

Aliases

None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

1. 20051221 Cisco PIX / CS ACS: Downloadable RADIUS ACLs vulnerability ↗
2. 16025 ↗
3. www.cisco.com ↗
4. 22193 ↗
5. 20051222 Re: Cisco PIX / CS ACS: Downloadable RADIUS ACLs vulnerability ↗
6. 18141 ↗

Record history

Published Dec 22, 2005 · Last refreshed Nov 3, 2026