Cisco Secure ACS up to 4.0.1 IP Access Control List Downloader improper authentication

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0$0-$5k0.00

A vulnerability was found in Cisco Secure ACS up to 4.0.1. It has been classified as critical. This affects some unknown functionality of the component IP Access Control List Downloader. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

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.

The weakness was released 01/03/2006 by ovt (Website). The advisory is shared at cisco.com. This vulnerability is uniquely identified as CVE-2005-4499 since 12/22/2005. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading to version 4.01 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.com.It is possible to mitigate the weakness by firewalling . The best possible mitigation is suggested to be applying a restrictive firewalling.

The vulnerability is also documented in the databases at X-Force (23792), SecurityFocus (BID 16025†), OSVDB (22193†), Secunia (SA18141†) and Vulnerability Center (SBV-11036†).

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.5
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍
Upgrade: Secure ACS 4.01
Patch: cisco.com

Timelineinfo

12/21/2005 🔍
12/22/2005 +1 days 🔍
12/22/2005 +0 days 🔍
12/22/2005 +0 days 🔍
01/03/2006 +12 days 🔍
01/03/2006 +0 days 🔍
01/06/2006 +2 days 🔍
04/11/2006 +95 days 🔍
07/02/2024 +6657 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: ovt
Status: Not defined

CVE: CVE-2005-4499 (🔍)
X-Force: 23792
SecurityFocus: 16025 - Cisco Downloadable RADIUS Policies Information Disclosure Vulnerability
Secunia: 18141 - Cisco Secure Access Control Server Downloadable IP Access Control List Vulnerability, Less Critical
OSVDB: 22193 - Cisco Secure Access Control Server (ACS) RAS/NAS Downloadable IP ACL Disclosure
Vulnerability Center: 11036 - Cisco Secure ACS Radius Allows Information Disclosure, High

Entryinfo

Created: 01/06/2006 10:32 AM
Updated: 07/02/2024 10:28 PM
Changes: 01/06/2006 10:32 AM (67), 12/05/2016 09:32 AM (8), 07/02/2024 10:28 PM (16)
Complete: 🔍
Cache ID: 18:8F6:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!