Cisco IOS 15.2(8)E2/15.2(8)E3/15.2(8)E4/15.2(8)E5 Access Control List access control

Summaryinfo

A vulnerability was found in Cisco IOS 15.2(8)E2/15.2(8)E3/15.2(8)E4/15.2(8)E5. It has been classified as critical. The affected element is an unknown function of the component Access Control List Handler. Performing a manipulation results in access control. This vulnerability was named CVE-2024-20465. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco IOS 15.2(8)E2/15.2(8)E3/15.2(8)E4/15.2(8)E5. It has been classified as critical. This affects an unknown code block of the component Access Control List Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on integrity. The summary by CVE is:

A vulnerability in the access control list (ACL) programming of Cisco IOS Software running on Cisco Industrial Ethernet 4000, 4010, and 5000 Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the incorrect handling of IPv4 ACLs on switched virtual interfaces when an administrator enables and disables Resilient Ethernet Protocol (REP). An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2024-20465 since 11/08/2023. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/27/2025). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 216854 (Cisco IOS Software on Industrial Ethernet Series Switches Access Control List Bypass (cisco-sa-repacl-9eXgnBpD)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (216854). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS

Version

• 15.2(8)E2
• 15.2(8)E3
• 15.2(8)E4
• 15.2(8)E5

License

• commercial

Website

• Vendor: https://www.cisco.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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